Sapienza University of Rome
Novel functionality of Quantum Complex Materials controlled by correlated nanoscale disorder unveiled by space resolved scanning XRD and XANES using synchrotron radiation
Prof. Antonio Bianconi is a director of Rome International Center for Materials Science, Italy.Antonio Bianconi is member of the Editorial Board of the of the journal and Member of the European Academy of Sciences. Dr.Antonio Bianconi research interests are synchrotron radiation research; complex oxides; quantum phenomena in complex matter; quantum confinement; superstripes in complex matter; lattice complexity in transition metal oxides; high Tc superconductors; valence fluctuation materialsAbstract
Chinese Academy of Sciences
A nonvolatile multifunctional programmable Spin Logic
Confronting with the gigantic volume of data produced every day, raising integration density by reducing the size of devices becomes harder and harder to meet the ever-increasing demand for high-performance computers. One feasible path is to actualize more logic functions in one cell. Many efforts have been dedicated to explore the prospective candidates of spin logic gate in different systems, such as Oersted-field controlled magnetic tunnel junctions and magnetic domain engineered nanowires, etc. However, only a few of them are compatible with CMOS architecture, which limits their practical applications [1-2]. Among of them, Spin Logic is of great interest as its desired property of nonvolatility and subsequentially the potential for realizing the idea of processing in memory architecture which is regarded to play increasingly important role in today’s fast-growing volumes of data. In this respect, we experimentally demonstrate a prototype Spin-Orbit Torque (SOT) based Spin Logic cell integrated with five frequently used logic functions (AND, OR, NOT, NAND and NOR). The cell can be easily programmed and reprogrammed to perform desired function [3-7]. As for a Spin Logic cell demonstration, two currents with same amplitude were applied separately to two mutual-orthogonal channels of Hall bar as logic inputs. The direction of the current serves as the logic input ‘1’ or ‘0’. A magnetic field was applied along the angle bisector between two currents (Fig.1a). Based on the magnetization response to different magnetic field and input currents, five logic functions, i.e. AND, OR, NAND, NOR and NOT, can also be implemented in a single cell. Programmability lies in the initial magnetic state and the polarity of magnetic field [3-7]. Furthermore, the information stored in cells is symmetry-protected, making it possible to expand into logic gate array where the cell can be manipulated one by one without changing the information of other undesired cells. This work provides a prospective example of multifunctional Spin Logic cell with reprogrammability and nonvolatility, which will advance the application of spin logic devices in near future. Keywords: Spin Logic; Magnetic Logic; Spin-Orbit Torque (SOT) Effect, MTJ, Nonvolatile, Multifunctional, Programmable.
Giulio was born in Trieste (Italy) in 1967, is currently based in ASEAN with Engineering operations in both Italy and Austria. He is Mechanical Engineer “cum laude” with a PhD in Microsystems and prior to Microspace has worked for 5 years as mechanical designer, R&D engineer and technical manager in SME, MNC and Industrial Research companies and has served as Officer in the Italian Navy at the Venice Shipyard. Giulio speaks his mother tongue Italian, professional English, fluent German and basic French.Abstract
Chinese Academy of Sciences
Electrically switching ferromagnets by spin orbit torques and their applications
Kaiyou Wang, PhD, Professor in Institute of Semiconductors in Chinese Academy of Sciences, Director of State Key Laboratory for Superlattices & Microstructure,obtained his PhD in 2005 at School of Physics & Astronomy, University of Nottingham. He worked as a researcher assistant from March to the end of May/2005 in University of Nottingham. He then worked as a researcher in Hitachi Cambridge Laboratory from June/2005 to the end of March/2009. During his stay in UK, he had twice short visits to Institute of Physics, Poland and also a short visit to Niels Bohr Institute, Copenhagen. He joined State Key Laboratory for Superlattices & Microstructure, Institute of Semiconductors in CAS as a member of “100 talent program”. In 2012, he has been awarded the “National Outstanding Youth foundation” from NSFC. In 2014, he was selected to be excellent in the “100 talent program” final assessment. In 2018, he has been awarded the IAAM medal. His current research interests include: (1) spintronic devices ; (2) physical properties based on low dimensional nano-electronic devices.Abstract
Electrically control the spin in solids is the core of spintronics. We investigated the spin Hall effect control the magnetization switching in heavy metal/ferromagnet multilayers and their applications . The spin-orbit torque switching controllablly in above structures have to have the assistant of the external magnetic field. Without breaking the symmetry of the structure of the thin film, we realize the deterministic magnetization switching in a hybrid ferromagnetic/ferroelectric structure with Pt/Co/Ni/Co/Pt layers on PMN-PT substrate.The effective magnetic field can be reversed by changing the direction of the applied electric field on the PMN-PT substrate, which fully replaces the controllability function of the external magnetic field.In addition,we realized the adjustable electrical current-induced magnetization switching in a magnetic multilayer structure without external magnetic field utilizing interlayer exchange coupling. We also investigatedmagnetic-field-free spin-orbit toque induced synaptic plasticity of a multi-state perpendicular ferromagnetic layer (FM1) in an antiferromagnetic interlayer exchange coupled Pt/FM1/Ta/FM2 structure.
Chang Gung University
Yakov M. Strelniker
Magneto-induced Anisotropy in Metamaterials with Periodic Nano-structures: From Per-mittivity and Resistivity to Magneto-thermoelectric Tensors
Yakov M. Strelniker is an Associate Professor in Bar Ilan University (Israel). He is an expert and a leading scientist in the field of condensed matter and statistical physics, theoretical and numerical studies of magneto-optical and magneto-transport properties of ordered and disordered metamaterials, percolation theory etc. Strelniker has discovered (in collaboration with D.J. Bergman) several surprising new physical phenomena, such as magneto-induced anisotropy of magneto-transport and magneto-optical properties of periodical metamaterials. He has also applied percolation theory to systems with hopping conductivity and has explained and modelled some novel phenomena observed experimentally in ferromagnetic and superconducting granular nano-films.Abstract
It is well known that natural or artificial materials with cubic or square lattices exhibit isotropic transport, optical, thermoelectric and other properties. Recently we have shown that application of a strong enough magnetic field B can spoil this isotropy when a cubic or square array of insu-lating (conducting) inclusions are placed inside a conducting (insulating) host medium (i.e., in the case of periodical composite or, as they are now called, metamaterials) [1-3]. Such a strong magneto-induced anisotropy can be observed when the dimensionless magnetic field H=μH|B|=ωcτis greater than a/R (B is the applied magnetic field in conventional units, μH is the Hall mobility, ωc is the cyclotron frequency, τ is the conductivity relaxation time, R is the inclu-sion radius, a is the lattice constant). It was first predicted  and then verified experimentally  that the strong field dc effective magnetoresistivity tensor ρe(H) of such metamaterials will exhibit a strong dependence on the precise orientations of the external magnetic field B and the volume averaged current density
Sun Yat-sen University
Prof. Dao-Xin Yao is a Deputy Dean, School of Physics Sun Yat-sen University China.Abstract
University of Tennessee
Will be added soon
Dr. Bin Hu received his Ph.D in Condensed Matter Physics from Chinese Academy of Sciences in 1991. His dissertation research was conducting polymers with the focus on interchain interaction effects on energy-band structure and dynamic processes of excited states. In 1992, Dr. Hu joined Department of Polymer Science and Engineering at University of Massachusetts/Amherst as a postdoctoral research fellow where he conducted the research on the development of advanced organic light-emitting diodes and solar cells using multi-component polymer blends. In 1995, Dr. Hu continued his polymer research at UMass/Amherst as a research scientist working on nano-morphology enhanced light-emitting, lasing, and photovoltaic functionalities of organic semicondcuting polymers. In 1998, Dr. Hu joined SICPA Securink Inc. as a senior research scientist where he led the R&D research on polymer polarized optical imaging technologies and organic two photon light-emitting materials. In 2002, Dr. Hu joined the faculty at University of Tennessee as an assistant Professor. Dr. Hus current research focuses on spin injection and magnetic field effects on optoelectronic processes of singlet and triplet excited states in organic light-emitting, lasing, and photovoltaic devices. The research activities include polymer synthesis and processing, device fabrication, and magneto-optoelectronic characterizations. The research objective is to control the constructive and non-constructive interactions of singlet and triplet excited states by using spin injection and magnetic field effects for the development next-generation organic semiconductor devices. Dr, Hu has authored or co-authored more than 80 scientific journal papers and has contributed to more than 40 oral presentations at national and international conferences including invited talks in APS, ACS, and SPIE meetings.Abstract
Will be added soon
Czech University of Life Sciences Prague
Dr. Lukas Trakal (22/09/1981) received the Master Degree in Hydrogeology at Charles University in 2006. From 2006 to 2008 he lived in USA and worked for private company Symbio-m Ltd. He recieved the PhD in 2012 at Czech University of Life Sciences (CULS) and worked then as a post-doc and from 2017 he is an associate professor at CULS. He attained: (i) 2-moths fellowship in 2014 at CEBAS, Murcia, Spain; (ii) 3-months fellowship in 2015 at the James Hutton Institute, Aberdeen, UK; and (iii) 6-months fellowship in 2018/2019 at SCK•CEN Belgian Nuclear Research Centre, Mol, Belgium. His main reserch activites are focused on utilization of biochar in order to: (i) remove metal(loid) from the environment; and (ii) increase water retention in soil. He is also interested in mathematical modelling of water flow and transport of contaminants in soil and measurement of physical and chemical properties of soil. He is author of several paper with IF (263 citations), two book chapters and other technical reports and works presented at international conferences.Abstract
Biochars prepared from five different agro-waste were tested as potential sorbents for Cd and Pb. Results indicated that all tested biochars can effectively remove both metals from aqueous solution (in the range between 43.8% and 100%; Trakal et al., 2014). The removal rate of both metals is the least affected by the biocharmorphology and specific surface but this removal efficiency is strongly pH-dependent. Next,the metal sorption efficiency of all tested biocharswere further modified by impregnation with magnetic particles (Trakal et al., 2016). All selected biochar characteristics were significantly affected after the modification. More specifically, the cation exchange capacity increased after the modification, except for grape stalk biochar.However, the changes in the pH value, PZC, and BET surface after modification process were less pronounced. The metal loading rate was also significantly improved, especially for Cd(II) sorption on/innut shield and plum stone biochars (10- and 16-times increase, respectively). The results indicated thatcation exchange (as a metal sorption mechanism) was strengthened after Fe oxide impregnation, whichlimited the desorbed amount of tested metals. In contrast, the magnetization of grape stalk biocharreduced Pb(II) sorption in comparison with that of pristine biochar. Magnetic modification is, therefore,more efficient for biochars with well-developed structure and for more mobile metals, such as Cd(II).
S.-R. Eric Yang
Professor S.-R. Eric Yang has completed his PhD from University of California at San Diego, USA and postdoctoral studies from University of Maryland, USA. He is a condensed matter theorist. His long-time interest has been the interplay between disorder and elecron interaction.Abstract
In polyacetylene and graphene nanoribbons a solition with a fractional charge exists as a domain wall connecting two different phases. In polyacetylene a fermion mass potential in the Dirac equation produces an excitation gap, and a twist in this scalar potential produces a zero energy soliton. Similarly, in gapful graphene nanoribbons a distortion in the chiral gauge field can produce a solitonic domain wall between two neighboring zigzag edges with different chiralities . The existence of a soliton in polyacetylene can lead to formation fractional charges on the opposite ends of polyacetylene. However, the situation is different in graphene nanoribbons with an excitation gap since antiferromagnetic coupling between the opposite zigzag edges (shown in Fig.1) gives rise to integer boundary charges . We show that presence of disorder in graphene nanoribbons partly mitigates the effect of antiferromagnetic coupling between the opposite zigzag edges, see Fig.2. As a consequence of this, midgap states can have fractional charges on the opposite zigzag edges in the weak disorder regime . The probability density of such a state is shown in Fig.3. The measurement of the differential conductance in atomically precise graphene zigzag nanoribbons  using a scanning tunneling microscopy may provide rich information on the distribution of edge charges.
Hasan Hamit Yurtseven
Middle East Technical University
Hasan Hamit Yurtseven is a Professor at university of Middle East Technical University, Turkey.He gratuated from Hacettepe University, Ankara-Turkey in 1977. He received his Ph.D degree in Physics from King’s College London. He had worked at Ankara University between 1985 and 1987. He had worked at Istanbul Technical University from 1987 to 2003.Abstract
Will be added soon
Prof. Cao is a “Royal Society Wolfson Research Merit Award” holder, U.K. He was a semi-finalist at the “Annual MIT-CHIEF Business Plan Contest”, U.S.A., in 2015; the “Dragon’s Den Competition Award” winner from Queen’s University Belfast, U.K., in 2014, the “Innovator of the Year Award” winner from Newcastle University, U.K., in 2013. Prof. Cao received the Best Paper Award at the 2013 International Symposium on Linear Drives for Industry Applications. He serves as an Editor for IEEE TRANSACTIONS ON POWER ELECTRONICS, IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, IEEE Industry Applications Magazine, IET Power Electronics, and Electric Power Components and Systems. He is also the Chief Editor for five Special Issues and four books. Prof. Cao is presently the Chairman for the Industrial Electronics Society, IEEE UK and Ireland Section.Abstract
Israel Institute of Technology
Prof. Koren received his PhD degree in Physics from the Hebrew University of Jerusalem in 1974, spent his post doc in the IBM Research lab in Zurich in 1974-5, and then joined the Technion – Israel Institute of Technology in Haifa – where he had been a full professor since 1998. His fields of interest in condensed matter physics and laser applications include high temperature superconductivity, proximity effects and magnetism using epitaxial thin films, junctions and multilayers with various ferromagnets, topological insulators and normal metals.Abstract
A magnetic proximity effect of a topological insulator in contact with an itinerant ferromagnet in thin film bilayers of Bi0.5Sb1.5Te3 and SrRuO3 will be described . I shall also discuss the observation of strongly suppressed superconductive proximity effect and ferromagnetism in topological insulator, ferromagnet and superconductor thin film trilayers of Bi2Se3 on SrRuO3 on underdoped YBa2Cu3Oy . By comparing our transport and magnetoresistance results of the bilayers and trilayers to those of a reference ferromagnetic film, and a reference trilayer with the topological layer replaced by a highly overdoped and non-superconducting La1.65Sr0.35CuO4 layer, we found that the topological layer strongly affect both proximity effects [1, 2]. While a conventional proximity effect was found in the bilayers, in the trilayers proximity induced edge currents led to the creation of a 2D network of 1D channels of weak-link superconductivity on the wafer. Conductance spectra of micro-bridges pattern on these trilayers reveal zero bias conductance peaks which are sensitive to magnetic field and could be attributed to Majorana zero energy bound states. Though our trilayer network of weak-link channels is disordered, it is similar in concept to that of the artificially prepared ordered network demonstrated in the literature by growing selectively Al on InAs . Both systems could provide a platform for future Majorana electronics for quantum computing.
High Magnetic Field Laboratory,Chinese Academy of Sciences
Mr Mingliang Tian has completed his PhD from Wuhan University, China and postdoctoral studies from University of Science and Technology of China and the Pennsylvania State University, USA. He is the vice director of China High Magnetic Field Laboratory and Dean of School of Physics and Materials Science, Anhui University, China. He has published more than 160 papers in reputed journals and has been serving as the Advisory Editorial Board member for the Journal of Magnetism and Magnetic Materials.Abstract
Will be added soon
University of Barcelona
Prof. Francesca Peiró is the leader of the Laboratory of Electron Nanoscopies (LENS-MIND) (www.lens.el.ub.edu) at the Department of Electronics and Biomedical Engineeringof the University of Barcelone and researcher of the Nanoscience and Nanotechnology Institute (In2UB). The main objective of LENS is the development of instrumental methods as well as data treatment for advanced scientific problems in nanomaterials usingTEM techniques. Prof. F. Peiró is one of the IP’s of the Network of Excellence for advanced aberration corrected electron microscopy in Spain. She is also member of the Executive Board of the Spanish Society of Microscopy. She has published more than 220 peer-reviewed publications and 3 book chapters, (H=32) and has presented more than 400 communications in international conferences with more than 45 invited talks.Abstract
Spinel oxide materials are characterized by an AB2O4 structure, where A and B are divalent and trivalent cations. The A cations occupy the tetrahedral positions (Th) in the structure, whereas the B cations occupy the octahedral (Oh) ones. If some degree of inversion, x, exists, the structure is represented as (A1-xBx)[AxB2-x]O4, where “( )” denote Th positions in the structure and “[ ]” Oh positions, respectively. The evaluation of the inversion parameter, x, in spinel materials is crucial to understand their functional magnetic properties. For large volume materials, several techniques such as x-rayand neutron diffraction refinement, Mössbauer spectroscopy, x-ray absorption or nuclear magnetic resonance are extensively used to assess the coordination of chemical species. Nevertheless, when dealing with nanoparticles or more complex systems such as core/shell nanostructures, high spatial resolution is required, making classical bulk approaches unsuitable. In this work, using scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS), two different methods to calculate the cation inversion parameter of spinel crystals with unprecedented spatial resolution are demonstrated. The first one is based in the measurements of energy loss near edge spectroscopy (ELNES) features, to evaluate the oxidation state of transition metals by using the onset of the L3 peak. Then the divalent/trivalent cation lattice distribution at atomic resolution can be obtained from spectrum images acquired at high energy and spatial resolution and the L3 onset shift between octahedral and tetrahedral coordination sites measured and used to determine the inversion parameter. An alternative way is to apply multivariate analysis (MVA) and spectral decomposition techniques to map the contribution of divalent and trivalent components. If such maps are obtained at atomic resolution, for a spinel crystal the cation inversion can be estimated as the fraction of signal from the 3+ ion at the tetrahedral coordination position. These two methods will be applied to characterize the cation inversion parameter in Fe3O4/Mn3O4 core/shell nanoparticles. Interestingly, X-ray absorption experiments, a well-stablished method to asses cation coordination inversion on the nanoparticle powder samples confirm the presence of cation inversion in Mn3O4 with reasonably similar values.
University of Moulay Ismail
Dr. Mourad Boughrara is a professor at Moulay Ismail University, he has completed his PhD from the same University in 2010. He is a condensed matter theorist. His current research focuseson the magnetic properties of spintronic systems, magnetic thin films, multilayers and diluted magnetic seminconductors, by using density functional theory and Monte Carlo simulation. He has published more than 26 papers in reputed journals.Abstract
(Ni, Co and Cu) doped ZnO nanoparticles with different concentrations (6%, 9% and 12%) have been investigated theoretically and experimentally, the nanoparticles have been synthesized by sol-gel method. Different techniques of characterization have been applied to study the microstructural, compositional and magnetic properties of the doped ZnO. Therefore, X-ray diffraction analysis indicates that the obtained samples give a hexagonal wurtzite structure with preferential orientation along (101). The increase of the doping concentration leads to reduce the nanoparticles size, and form segregate of cluster which leads to enhance the antiferromagnetic interaction and suppress the ferromagnetic behavior.The Magnetization Field (M-H) curves revealed the existence of ferromagnetism in all doped ZnO NPs samples at the room temperature. The origin of magnetism properties at the room temperature dependson the nature of doping agent. First principles calculation based on the density functional theory is also applied to study the effect of Ni, Co and Cu on the structural and electronic properties in order to have a deep understanding for the magnetic properties. The DFT results have been completed by Monte Carlo simulation based on the heat bath algorithm to validate the experimental data and to explain several observations. Therefore, the obtained results indicate that Ni doped ZnO is the promising elements compared to the Cu and Co and can be used as DMS at the room temperature.
Jozef Stefan Institute
Prof. Dr. Spomenka Kobe, Scientific Advisor and 16 years (until 30th April 2018) Head of the Department for Nanostructured materials at Jožef Stefan Institute is a full professor at the International Postgraduate School “Jožef Stefan” and a member of the Governing Board of the School. She is the Leader of the National Research Programme “Nanostructured Materials,” and until 2017 the Slovene director of The International Associated Laboratory between CNRS, Nancy, France and Jožef Stefan Institute, Ljubljana, Slovenia. She initiated rare-earth magnet research activities in Slovenia and was recently the Coordinator of the European project “Replacement and Original Magnet Engineering Option” - ROMEO. Prof. Kobe was the President of the Academic Society for Science and Engineering, and in the year 2017, she became a Member of the Slovenian Academy of Engineering. She is the recipient of two State Awards for Scientific Research and two Innovation Awards from industry for the successful transfer of technology. Her scientific work is documented in 631 bibliographical units. Prof. Kobe acted as the European Expert and Evaluator in the field of magnetism and magnetic materials and represented Europe during the three Trilateral (Europe-US‐Japan) meetings on Critical Raw Materials.Abstract
Rare-Earth Transition Metals permanent magnets are vital components in the rapidly-developing renewable energy sector, where the motors require strong magnets with the ability to operate at temperatures well over 100°C. To achieve high coercivity, remanence and consequently high energy product at elevated temperatures the addition of heavy rare earth (HRE) to the basic Nd-Fe-B composition is needed. On the list of Critical Raw Materials published by the EC in 2014, HRE is on the very top of it. To drastically reduce the use of HRE we focused on developing a new method, which should enable us to achieve the properties needed for high-temperature application with the lowest amount of scarce elements. By our new inventive technique further transferred to a pilot production, we could minimize the amount of HRE used, down to 0.2 at %, the improvement of coercivity was 30 % with minimal loss in remanence. The total saving of the HRE is 16-times less need for the same performance, which is a significant contribution to the world economy and clean environment. In studying the mechanism for such an improvement in coercivity without significantly decreasing the remanence, a detailed microstructure investigation was performed by using high-resolution transmission electron microscopy. Besides the use of these new developed high energy magnets for electric and hybrid cars and the wind turbine generators the important application is also as the source of the magnetic field in the development of the new magnetic cooling devices.
Jožef Stefan Institute
Prof. dr. Darko Makovec is full professor, head of Department for Materials Synthesis and scientific chancellor at Jožef Stefan Institute. He has defended his PhD from chemistry at the University of Ljubljana in year 1995. In 2001-2002 he worked as a Fulbright scholar at University of Illinois at Urbana-Champaign, USA. His scientific interests are focused in synthesis and characterization of the inorganic and hybrid nanomaterials, especially materials containing magnetic nanoparticles. He is also expert in advanced electron microscopy. Prof Makovec has published over 170 peer-review articles.Abstract
Barium hexaferrite (HF) nanoplatelets display a high uniaxial magnetocrystalline anisotropy with an easy axis that is perpendicular to the platelet. This unique property gives them tremendous potential in innovative applications, for example, in the magneto-mechanical eradication of cancer cells. As the nanoplatelets adopt a distinct structure and composition, which are significantly different to the bulk, they can be considered as novel structural variations of hexaferrite stabilized on the nanoscale. For example, the structure of the normally used nanoplatelets (~ 50 nm wide and 3 nm thick) can be represented by a SRSRS stacking sequence, where S and R represent a hexagonal (BaFe6O11)2- and a cubic (Fe6O8)2+ structural block, respectively. Thus, the nanoplatelets are Fe-rich (BaFe15O23) when compared to the BaFe12O19 HF bulk. The weak point of the HF nanoplatelets is their modest saturation magnetization, MS. The MS can be effectively increased by substitution of a part of Fe3+ ions in the nanoplatelet structure with Sc3+ ions. The increase was unexpected as the Sc-substitution decreases the MS of the bulk. In the lecture this opposite effect of the Sc-substitution in the nanoplatelets than in the bulk will be discussed based on combination of detailed analysis of the lattice site of Sc incorporation and ab-initio calculations.
University of Silesia
Dr.Iwona Lazar works in the group of prof.KrystianRoleder in the University of Silesia, Poland. She received PhD degree in Physics in 2005, and since then has been exploring the ferroelectric and piezoelectric properties of ABO3perovskites, including the physics of phase transitionswhich these materials undergo.Especially she is interested in the PbZr1-xTixO3(PZT) and lead free piezoelectric materials. Recently, she has focused on the PZT single crystals, for which piezoelectric properties - much better than those of ceramics - have been theoretically predicted. She is author and co-author of papers published in prestigious international journals, and last yearshe begun investigations of magnetic properties of some perovskites.Abstract
University of Antwerp
Roeland Samson is full professor at University of Antwerp, Belgium. He leads the Laboratory of Environmental and Urban Ecology. His research focusses on the importance of urban green infrastructures for - between other ecosystem services - air pollution mitigation, based on both an experimental and moddeling approach. He has major expertise on vegetation-based biomonitoring of air quality, and is a leading voice in Belgium on environmentally-oriented citizen science projects, based on biomagnetic monitoring techniques. He has published more than 100 papers in reputed peer-reviewed journals and is co-editor of a book on urban forests.Abstract
Air pollution is one of the most important environmental concerns having a huge impact on climate, ecosystems but also on human health. Especially particulate matter is believed to have a major health impact. In many countries dense networks of official air monitoring stations exist. In many western cities several of these monitoring stations are installed and believed to represent the urban air quality. However, several studies have shown that especially urban air quality shows an enormous spatial variation due to differences in the urban architecture and traffic flows. Correct and detailed knowledge of this spatial variation is, however, of the utmost importance for reliable exposure assessment of citizens. Environmental biomagnetic monitoring offers the possibility to use vegetation as high-spatial resolution monitoring stations for atmospheric particulate matter. This presentation gives an overview of the broad expertise of the research group and the international research community on biomagnetic monitoring of atmospheric particulates in urban and industrial environments. Topics that will be discussed are species specific differences in leaf characteristics, and their temporal dynamics, that drives leaf particle deposition. The intra-urban spatio-temporal variation in atmospheric particulate matter is explained at various spatial scales from street canyons over urban and even regional level. The use of biomagnetic monitoring in very successfull citizen science projects in Belgium and European level is intensively illustrated, together with the societal impact of these projects. In conclusion the potential of biomagnetic monitoring techniques to become included in official air quality monitoring is discussed.
Australian Nuclear Science and Technology
Guochu Deng has finished his PhD in 2006 from Chinese Academy of Science, China and did postdoc studies in ÉcolePolytechniqueFédérale de Lausanne (EPFL) and Paul Scherrer Institute (PSI) in Switzerland. He joined Australian Centre for Neutron Scattering, Australia Nuclear Science and Technology Organization as an instrument scientist in 2011, and has worked on the inelastic neutron scattering field since then. He has published more than 40 papers in the field of materials science and condensed matter physics. His current research topics include various fields of hard-condensed matter physics, such as multiferroics, magnetism, ferroelectrics and superconductivity, by using neutron diffraction and inelastic neutron scattering techniques.Abstract
Will be added soon
University of Tsukuba
Tomoya Ono was born in Okayama, Japan, in 1974. He received degree of Engineering Bachelor (1997), Engineering Master (1998), and Ph.D (2001) from Osaka University. He was appointed as research fellow of Japan Society for the Promotion of the Science in 2000, as an assistant professor at Osaka University in 2001, as an Alexande vin Humboldt Fellow in 2007, as PRESTO researcher in 2013, and as associate professor at the University of Tsukuba in 2014. His current research interests include the design and simulation of quantum transport and the development of new computational methods for first-principles calculations.Abstract
The structural, magnetic, and spin dependent transport protpertis of graphene and h-BN based magnetro resistive junctions on ferromagnetic transition metals (fcc-Ni and Co(111)) surface are examined by first-principles calculation based on density functional theory (DFT). We investigate not only symmetric junctions, i.e., with te same metal on both sides of the spacer layer Ni(111), but also non-symmetric, two different (Ni and Co) metallic ferromagnetic electrodes. The atomic and electronic structures are examined by plane-wave based DFT code, VASP, and the transport property is calculated by the real-space grid based DFT code, RSPACE. When a single and bilayer graphene sheet is sandwiched between these transition metal electrodes, strong interaction with chemical bonding between the metal surface atoms and carbon atoms destroys the unique dirac cone characteristic of the inserted graphene sheet. The spin filtering effect is quite sensitive to ferromagnetic metal electrodes of junctions and the thickness of graphene or h-BN layers. It is noteworthy that the tunneling magneroresistance (TMR) ratio is higher for symmetric junctions rather than non-symmetric junctions. The highest 50% TMR ratio is acheved for bilayer graphene while it is 43% for bilayer h-BN. These results indicate that the bilayer sheets of graphene and h-BN are promising candidates for the spacer of magnetroresistive junctions in the application of spintronics.
Leibniz institute for solid state and materials research dresden
Dr. Gaël Bastien performed his Phd thesis in CEA-Grenoble on Uranium based superconductors and defended it in January 2017. He is now post doctorant at the IFW-Dresden. He works on frustrated magnetism and is funded by the Marie Skłodowska-Curie foundation.Abstract
The Kitaev model is a promising way to realize a topological quantum spin liquid, which would be suitable for quantum computing. Kitaev magnetic interactions were identified in the Jeff =1/2 Mott insulator α-RuCl3, however, due to additional interactions, this system harbors an antiferromagnetic ground state instead of the quantum spin liquid. This ordered state can be suppressed under magnetic fields toward a field-induced quantum spin liquid. In this study, we used hydrostatic pressure and chemical substitution to tune the magnetic properties of α-RuCl3 and we discuss here the effect of this tuning on the magnetic interactions, the magnetic ground state and the field-induced quantum spin liquid. Magnetization measurements under hydrostatic pressure revealed a pressure-induced structural transition into a non magnetic state : a valence bond crystal with the formation of Ru-Ru bonds . On the other hand, the effect of partial substitution of the Ru3+ ions with Jeff = 1/2 moments by Cr3+ ions with S = 3/2 was studied by means of magnetization, ac susceptibility and specific heat measurements. The ground state of Ru1-xCrxCl3 was found to be a spin glass on a broad Cr concentration range.
Sun Yat-Sen University
Dr.Hao Zhang is a associate Professor at university of Tsinghua University, China.Abstract
Dr.Hai-Hu Wen is a Professor at Nanjing University, Chang Jiang Scholarship Professor, group leader, director of Center for Superconducting Physics and Materials of Nanjing university. Published more than 340 scientific papers in internationally recognized journals, received over 7000 citations, h-index 46. Gave about 100 speeches or invited talks at international conferences.Abstract
Juan José Novoa Vide
University of Barcelona
Will be added soonAbstract
Will be added soon
Ural Federal University
I was born in 1960 in Tomsk, Russia. I graduated from the Tomsk Politechnical Institute in 1983 with the diploma of engineer-physicist. After graduating I worked in Institute of High Current Electronics of Siberian Branch of RAS (Tomsk) as an engineer and junior researcher (since 1985). Since 1986 I work in the Institute of Electrophysics Ural Branch RAS as junior researcher. I graduated from the post-graduate courses of the IEP UB RAS and got a degree of Candidate (1994) and Doctor of Technical Sciences (in Electrophysics) in 2005. Since 2011 I am a leader of the Electrophysics Technology Group IEP UB RAS. I participated in the development of a number of high-current electron accelerators and bremsstrahlung generators with an intermediate inductive energy store and an exploding wires, as well as with a plasma opening switch. I developed radiation’s methods for measuring electron beam parameters, including the braking radiation of the electron beam. I developed several repetitive nanosecond electron accelerators with a semiconductor opening switch and a thyratron magnetic energy compression circuit, which work in the Russian and foreign scientific institutions, and they also are introduced in production. I am carrying out work aimed at applying a repetitive nanosecond electron beam to conduct chemical reactions, perform sterilization, and clean water. I developed method and setups for radiochemical sterilization of hermetically packed medical instruments and liquid, powdered or granulated materials in food industry. I developed a method for production of nanopowders, including evaporation of a target by a pulsed electron beam, condensation of the vapor of the material in a low-pressure gas, and deposition of nanopowders on a large cold square crystallizer. By this method, it is possible to produce oxide nanopowders with the characteristic size of 3-5 nm and nanopowder agglomerates with the characteristic size of 20-200 nm having the specific surface of up to 338 m2/g at the production rate of up to 10 g/h and the specific energy consumption of less than 120 Wh/g.Abstract
By method of pulsed electron beam evaporation in vacuum of targets from non-magnetic in bulk state, Al2O3, SiO2, CeO2, CaF2 and BaF2 magnetic nanopowders with a high specific surface were produced. The nanopowders were irradiated in air in room-temperature by electrons with energy of 0.7 MeV with pulse FWHM of 100 ns, using a pulse-periodic accelerator URT-1 for 15 and 30 minutes. The magnetic, thermal, and cathodoluminescence characteristics of nanopowders were measured before and after irradiation. It was established that the electron irradiation non-monotonically changes the magnetization of the pristine samples. To the contrary, a clear correlation between the intensity of cathodoluminescence and the irradiation does is found in the most of the oxides and fluorides. There was a decrease in the intensity of cathodoluminescence after irradiation. Thermal stability and phase transformations of unirradiated and irradiated nanopowders were analyzed by synchronous analysis using thermogravimetry and differential scanning calorimetry. Luminescent and thermal properties reflect the transformation of structural defects in nanopowders more strongly after the exposure to a pulsed electron beam in comparison with corresponding changes of the nanopowders magnetic response.
Xian Jiaotong University
Dr. Tianyu Mais a full professor of Frontier Institute of Science and Technology (FIST), Xi’an Jiaotong University, China. He obtained Ph.D. degree from Beihang University (former name: Beijing University of Aeronautics and Astronautics) in 2006, then worked in Zhejiang University, China. From 2011 to 2013, he worked in National Institute for Materials Sciences (NIMS), Japan as a JSPS (Japan Society for the Promotion of Science) research fellow. His research interests focus on functional magnetic materials and permanent magnets. He has done collaborative work with industries and developed techniques to fabricate low cost rare earth permanent magnets. He haspublished more than 120 papers in peer-reviewed journals. He serves as a referee for over 30 international journals, such as: Acta Mater.and Adv. Funct. Mater.etc.Abstract
Ferromagnetic materials with large magnetostriction have found wide applications in sensors, transducers and actuators based on the conversion between magnetic and elastic energies. Fe-Ga solid solutions, known for the large magnetostriction at low external fields and the good mechanical property, have attracted considerable interest since 2000. The structural diversity of Fe-Ga alloys allows one to obtain abundant properties from the composites containing two or more phases. In this talk, we shall present our recent efforts to extend the function scope of this traditional material through controlling the diffusional D03 (ordered BCC) → L12 (ordered FCC) phase transformation. Using the “solution-treating and aging” route, natural ferromagnetic Fe-Ga composites containing both BCC and FCC phases have been prepared. The slow transformation kinetics, different intrinsic magnetic properties and elastic properties of these two phases can facilitate novel properties that are highly desired in engineering applications. The gradual transformation from the BCC phase with lower magnetization into the FCC phase with higher magnetization can facilitate highly thermal stable magnetization up to 880 K [Nature Comm. 2017]. The compensation of stress-induced anisotropies between these two phases with opposite magnetostriction signs can facilitate highly stable magnetic permeability under stresses [PR Mater. 2018]. The semi-coherent phase interface between them can also bring 2~3 times enhancement in damping capacity [unpublished]. Our work suggests that controlling the diffusional phase transformation is a useful tool to design multi-functional ferromagnetic materials.
University of Science and Technology
Dr. Jianlin Wang is an associate professor in National Synchrotron Radiation Laboratory, University of Science and Technology of China. He obtained his bachelor degree in 2010 and Ph. D. degree in 2015 from University of Science and Technology of China. Then he worked in the National Synchrotron Radiation Laboratory as post-doctoral research fellow. In 2016, he joined Department of Physics, University of Tokyo, Japan, as visiting researcher, majoring in the independent 4-tip STM and in situ transport measurement. He was back to National Synchrotron Radiation Laboratory as associate professor in 2008. He has published more than 30 peer-reviewed papers. His current research interests are functional oxides, 2-D materials and spintronics.Abstract
Will be added soon
Jozef Stefan Institute
Will be added soonAbstract
Will be added soon
University of Silesia Poland
Krystian Roleder is a professor at university of University of Silesia, Poland.Abstract
Goethe University Frankfurt
Roswitha and Wolfgang Wiltschko are both retired professors of Zoology at the Goethe-University at Frankfurt a.M., where they received their Ph.D.s in Biology. Their joint research focused on the avian magnetic compass, its functional mode, biological significance and possible reception mechanisms as well as bird navigation. Several stays for research in southern Spain, at Cornell University in the 1970/80, at the Università di Pisa, Italy, and in the 1990/2000 at the University of New England in Armidale, NSW, Australia and at the University of Auckland, New Zealand in. Both are Honorable Fellows of the Royal Institute of Navigation, London.Abstract
The geomagnetic field provides all animals that can sense it with a wealth of navigational information. This is best studied in birds: they can use the direction of the geomagnetic field as a compass and components like intensity as a part of their navigational map. The magnetic compass was analyzed based on the orientation of the spontaneous activity of migratory birds, an analysis that revealed some surprising characteristics: (1) The avian magnetic compass functions only in a biological windows around the intensity of the local magnetic field. This window is flexible, however; birds can oriented in intensities outside if they have been exposed to these intensities before. (2) Birds are not sensitive to the polarity of the magnetic field, but only to the axial course of the field lines, which they interpret it by their inclination – their compass is an inclination compass. (3) The avian magnetic compass is light-dependent, requiring light from the short-wavelength range of the spectrum from UV to about 565 nm green. -These unusual characteristics of the avian magnetic compass caused Ritz and colleagues (2000) to propose the Radical Pair Model, which suggests spin-chemical processes in the eye with cryptochrome, a flavoprotein, forming the crucial radical pairs. Observations are in agreement with this model: orientation is disrupted by RF-fields, and cryptochrome 1a is found in the outer segments of the UV cones in the retina of birds. - Magnetic compass orientation has also been demonstrated in other animal groups, but there seem to be some differences in the functional modes. Birds are also able to record the intensity of the geomagnetic field and use it as a component of the map mechanism determining position. This is suggested by the disoriented behavior of homing pigeons released in magnetic anomalies and by some ‘virtual’ displacement experiments with birds exposed to magnetic fields from distant sites, where these birds showed compensatory headings. The receptor mechanisms for this sense are still poorly known; they seem to involve in magnetite-based receptors in the beak.- Birds thus have two receptors for sensing different aspects of the magnetic field, one for sensing magnetic directions in the eyes and one for sensing magnetic intensity.
university of Boumerdes
Yahia CHERGUI has completed his PhD from Badji Mokhtar University in Annaba, Algeria. He is a teacher in Boumerdes University since 2012. He has published more than 7 papers in reputed journals and has been serving as a referee with condensed matter journal (IOP) and Energy journal (Elsevier).He passed 6 months in Cardiff University and Queen University for summer school.Abstract
Zinc Oxide is a semiconductor which used in electronic devices due to its physical and its chemical bonds properties, where these chemical bonds is between ionic and covalent.In this work we investigated parallel molecular dynamics and dlpoly_4 software(RAVEN Supercomputer of Cardiff University) to analyse the effect of pressure and temperature in the range of 0-200GPa and 300-3000K on chemical bonds Zn-Zn, Zn-O, and O-O of ZnO wurtzite type. The short-range of interatomic interaction is modeled by a pair potential of Buchingham and the long-range by the Coulomb interaction. Our results are in vicinity of theoritical and experimental lierature although no more work under previous conditions of extended temperature and pressure. These data is very important in industry of technology and nanotechnology especialy in geophysics, medecine, pharmacetics , and cosmetics. Our results are a simulation prediction which need confirmation in future.
Dr. Xinhua Zhu, a full professor of School of Physics, Nanjing University, China, since 2006. He obtained B.S., M.S., and Ph.D. degrees in Materials Science all from Xi’an Jiaotong University, Xi’an, in 1989, 1992, and 1995 respectively. He worked as academic consultant at King Abdullah University of Science and Technology (KAUST, Kingdom of Saudi Arabia) in 2012 and 2013, Queen’s University of Belfast (United Kingdom) from 2004 to 2006, Max-Planck-Inst Mikrostrukturphys (Halle Saale, Germany) as an Alexander von Humboldt Research Fellowship from 2003 to 2004, and The Hong Kong Polytechnic University from 2000 to 2001. He was the recipient of the Alexander von Humboldt Research Scholarship in 2002, the First Grade National Natural Science prize from Ministry of Education of China in 2003, and Second Grade National Natural Science price from Ministry of Science and Technology of China in 2005. His current research interests include processing of multiferroic perovskite materials (nanocrystals, thin films, and bulk materials), and nanoscaled structural fabrication; defects and microstructures of perovksite-structured multiferroics characterized by (HR)TEM techniques; and microstructure/property relationships in both advanced functional ceramic materials and nanostructured functional materials. He has published more than 120 papers in peer-reviewed journals, 6 book chapters. He serves as a referee for over 20 international journals such as Nat. Commun., Adv. Mater., and etc.Abstract
Will be added soon
The Hong Kong Polytechnic University
Prof. Jinlian Hu is a renowned scientist in shape memory textiles and has been leading a number of large scale of research projects in related areas. She has a Google H-index of 49 with 8877 citations. She is a partner and consultant to a large number of world leading companies and organizations including Procter & Gamble and INVISTA for consecutive projects. Due to her achievements, the Hong Kong PolyU awarded her the highest International Consultancy Awards two times and one Technology Transfer Award apart from around 60 regional, national and international prize recognitions. Examples include Chinese Central Government Elite Scheme Award, Distinguished Achievement Award in Basic or Applied Fiber Science by The Fiber Society and First-Class Prize, Sang Ma Textile Science and Technology Award by the Hong Kong Sang Ma Trust Fund. From 2004 and onwards, Shape Memory Textile Center received overwhelming responses for its original research from the media including all local newspapers, Associated Press, local TV headline news, Discovery Channel, TV Spain, Beijing TV and numerous Websites. Professor Hu was invited to give talks to organizations such as BASF, Levi’s, China Dyeing, Formosa Group, Invista and P&G, Johnson & Johnson, DuPont, Smith & Nephew on the topic of Shape Memory Polymers and their Applications. Typical work is published in Progress in Polymer Science, Journal of Materials Chemistry A and Biomaterials. In recent years, Professor Hu has been engaged extensively in spider silk study from genetic engineering to chemical synthesis of spidrions in order to mimic spider silk for smart materials and manmade high performance spider silk fibers. Combining her rich knowledge in textile fibers and materials, her talk will provide an inspirational and insightful review and integration of advancements and future development of spider silk materials.Abstract
Pavel G. Baranov
Pavel Baranov has completed his Ph.D and and doctoral thesis in Ioffe Physical-Technical Institute, St. Petersburg, Russian Academy of Sciences. He is the head of laboratory of microwave spectroscopy of crystals, professor in Ioffe Institute. He is the supervisor of more than ten PhD theses. He has about 400 publications and conferences, 20 patents (see http://www.ioffe.ru/labmsc/en/main.html ) Book: “Magnetic Resonance of Semiconductors and Their Nanostructures: Basic and Advanced Applications”: P. G. Baranov, H. J. von Bardeleben, F. Jelezko, J. Wrachtrup, Springer Series in Materials Science, Volume 253, Springer-Verlag GmbH Austria 2017. Head of more 20 projects, including the international projects.Abstract
The main direction of development of modern technologies is miniaturization of the element base of micro- and optoelectronics. Any device with nanoscale features inevitably displays some types of quantum behavior. Spin is a purely quantum object and spin properties begin to play a decisive role in the creation of nanoscale device structures. Quantum operational principles bring a new sensing philosophy by providing an interaction platform beyond the classical limits of sensitivity. Exploitation of quantum degrees of freedom foreseeing a new era of quantum technologies. The practical realization requires a drastic shift from most of the quantum systems used today, because they either do not operate under ambient conditions or not compatible with the existing wafer-scale technologies. The ultimate object of miniaturization is a device based on a single defect, and this fantastic scenario begins to be realized now using color centers in diamond and silicon carbide. The unique quantum properties of the spin color center in silicon carbide open a new role for this material as a flexible and practical platform for spintronics, photonics, quantum information processing, and sensing under ambient conditions. Their spin state can be initialized, manipulated, and read using optically detected magnetic resonance at room temperature and above, whose radiation extends to a near infrared range which is area of transparency for fiber optics and living systems. The ground and the excited states have quadruplet spin state and a population inversion in the ground state can be generated using optical pumping, leading to stimulated microwave emission.
Prof. Dr. Jianhong XU received his B.Sc. and Ph.D. at Tsinghua University in 2002 and 2007 respectively. He continued his research in Tsinghua University as a postdoctor after graduation. He finished the postdoctoral program in May 2009, and became a formal faculty of the Department of Chemical Engineering, Tsinghua University. He had studied as a visiting scholar at Prof. David Weitz lab in Harvard University during 2012.7~2013.6. At present, his research areas are focusing on the microstructured chemical system, multiphase microfluidic technology and functional materials synthesis. He has more than 130 peer-reviewedpublications. He was awarded “Lab on a Chip Emerging Investigator” in 2012. He got the “Excellent Young Scientists Fund” from the National Natural Science Foundation of China (NSFC) in 2013. In 2016, he was awarded as Young Scholar of “Chang Jiang Scholars Program of China” of MOE.Abstract
We used the microfluidic technology for preparing gas-liquid Janus emulsions, firstly proposed a one-step preparation method of micro-grippers, and then characterized the function of oriented and precise delivery behavior. Because of the enrichment of the Fe3O4 nanoparticles, the micro-gripper can reach a speed of 1.5 mm/s driven by a magnetic field. The micro-gripper’s body is made of Poly(N-Isopropylacrylamide) hydrogel, a reversible temperature-responsive polymer. The thermo-sensitivity of hydrogels offers the function of grasping, to closely integrate with the target carried, ensuring the stability of the carrying process. The reversible variation of the hydrogel allows the micro- gripper to be reusable and having a long shelf life.
West Virginia University
Dr. Mikel “Micky” Holcomb is an Associate Professor of Physics at West Virginia University, soon to be on sabbatical at Carnegie Mellon University. She got her PhD at UC Berkeley (advisor: Ramesh), bachelors at Vanderbilt (advisor: Tolk) and did an internship at IBM Almaden. While she enjoys collaborating on a variety topics, her main projects involve complex oxide magnetic thin films and magnetoelectric heterostructures. Some other current research areas include olivines, experimentally-motivated machine learning efforts, ultrafast optical measurements, and synchrotron measurements. She enjoys collaborations, particularly with people interested in element specific x-ray absorption spectroscopy measurements, machine learning, or her high-quality complex oxide thin films. She currently has funding from the National Science Foundation, the Department of Energy and NASA.Abstract
University of Ljubljana
Dr. Urban Tomc is a researcher in the Laboratory for refrigeration and district energy, Faculty of mechanical engineering at University of Ljubljana. He completed his PhD at University of Ljubljana in 2016 titled Improvements to the heat transfer of an active magnetic regenerator. He is one of the co-authors of the scientific book titled Magnetocaloric Energy Conversion: From Theory to Applications, which is the first in the field. His main scopes of research are magnetic refrigeration and thermal switching mechanisms. Currently he is working as a technical project leader in a national project IQ HOME, where a magentic wine cooler is being developed in collaboration with Slovenian company for household appliances. Furthermore, he is also working on a postdoctoral project on Digital microfluidics in magnetocaloric refrigeration.Abstract
In recent years, magnetic refrigeration has shown the potential to be applied as an alternative to vapour-compression technology. However, despite the substantial progress made in the field of magnetic refrigeration, there are still many issues that need to be resolved. Mostly, these challenges relate to the use of rare-earth materials, energy efficiency and the cost of potential future devices. This presentations presents a new magnetic refrigeration prototype, that operates with a rare-earth-free magnetic field source and was built to be implemented in the wine refrigeration cabinet. Its main novelty, in comparison to existing state-of-the-art magnetic prototypes, is the application of a static electromagnet assembly that can regenerate magnetic energy and enables a rapid alternation of the magnetic field, which is one of the crucial operating parameters that could lead towards the future miniaturization of magnetocaloric devices. The presented prototype consists of two electromagnetic assemblies, each containing a packed-bed active magnetic regenerator (AMR) that consists of about 57 g of Gd or Gd-Y magnetocaloric materials (MCMs) in the form of spheres. The prototype was experimentally tested for its performance in terms of temperature span and cooling power. For instance, operating with a single-layered Gd AMR at 2-Hz operating frequency, the prototype produced 75 Wkg-1 of specific cooling power (per MCM mass), while maintaining a temperature span of 6,5 K below ambient conditions.
Xi’an Jiaotong University
Ming Liu is currently an associate professor in school of Microelectronics, Xi’an Jiaotong University, China. He received B.S.degree from Hebei Normal University (2005) and Ph.D. degree fromDalian University of Technology (2011), China. During the periodfrom 2008. 03 to 2010.10, he was working in the University of Texasat San Antonio, as a visiting student. His current research is focusedon functional oxide thin film and related devices, especiallymultiferroics, dielectric energy storage and flexible electronics.Abstract
El Kebir Hlil
University of Grenoble
El Kebir HLIL is a Professor of Physics of Materials in the University of Grenoble Alpes at Grenoble, France. From Teaching experience point of view, He is a lecturer of Physics of material including characterizations, physical properties and namely materials for energy. He has worked in several research fields and namely on materials for storage and conversion of energy such as Metal hydrides, Thermoelectric materials, Magnetocaloric materials and Semi-conductor materials. He has participated in several International Schools as lecturer of electronic structure calculations, characterization of powders and nanomaterials as well as materials for energy. He supervised over 60 PhD students. He contributed to over 600 conferences and He published about 700 papers in international learned journals (see website of ResearchGate).Abstract
Experimentaland theoretical review on magnetism of new ceramics potentially employed in cooling systems based on magnetic refrigeration will be presented and discussed in terms of their properties improvement. Both theoretical and experimental approaches will be presented as tools to investigate the magnetocaloric properties of such materials. From experimental point of view, light will be shed on synthesis routes as well as on characterization techniques at both laboratories or on instruments at Large Scale Facilities using polarized synchrotron radiation or neutrons. Electronic structure calculations based on DFT combined with both STSHE as well as Monte Carlo Simulations will be also presented as tools to achieve the magnetocaloric picture obtained from experimental data. All crucial magnetocaloric parameters computed or measured will be discussed in terms of refrigeration efficiency. Finally, available magnetic cooling systems will be debated.
Evgeny Tretyakov is director at N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Russia.Dr. Tretyakov research interests are Organic chemistry & Molecular magnetism, Functionally oriented synthesis of organic radicals, Design of magnetically active heterospin systems,Synthesis of fluorinated heterocycles and quinones.Prof. Evgeny Grants and Awards are State Prize for young scientists (2000), State Prize for young scientists (2002), Award from the International Science and Education Development Foundation (2002), Award from the Academia Europaea. He is a Author and co-author of more than 150 scientific publications.Abstract
Raghvendra Singh Yadav
Tomas Bata University in Zlin
Dr. Raghvendra Singh Yadav is working as Senior Researcher at Centre of Polymer Systems, Tomas Bata University in Zlin, Czech Republic from 1 October 2017. Currently, he is working on the topic ‘‘Advanced Graphene-Spinel Ferrite-Polymer nanocomposite for microwave absorbing/ electromagnetic interference shielding applications’’. He obtained his Ph.D. degree in Physics at University of Allahabad, India in 2011, on the topic ‘‘Synthesis and Characterization of Nanophosphor for Light Emitting Diodes (LEDs) and Plasma Display Panels (PDPs)’’. He has about 57 publications (h-index=20 and citations=1129) in reputed international journals in the field of materials science and nanotechnology. He also published one book and two book chapters. He has been also involved as Editorial Board Member in several journals, namely (1) Material Sciences and Applications (Scientific Research Publishing, USA), (2) Journal of Biomaterials and Nanobiotechnology (Scientific Research Publishing, USA), (3) International Journal of Nano Studies and Technology(IJNST) ISSN:2167-8685 (SciDoc Publishers, USA).Abstract
Intelligent spinel ferrite nanoparticles have a vast potential for several scientific and technological applications such as in solar cells, magnetostrictive sensors, transducers, actuators, supercapacitors, Li-ion batteries, drug delivery, hyperthermia, memory devices, microwave and spintronic devices, catalysis, gas sensor, etc. The physical properties of spinel ferrite nanoparticles depend on particle size and cation distribution at tetrahedral and octahedral sites. A better understanding of structural characteristics of spinel ferrite nanoparticles are highly beneficial to tune the physical properties for desired applications. Herein, efforts were carried out to synthesize spinel ferrite nanoparticles by a sonochemical method and to investigate their particle size, cation distribution, magnetic, dielectric, electrical, impedance and modulus spectroscopy characteristics for microwave frequency applications. The sonochemically synthesized spinel ferrite nanoparticles were characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometer (VSM), etc. The XRD results revealed that ultrasonic irradiation seems to be favourable to achieve highly crystalline single crystal phase of spinel ferrite nanoparticles without any post annealing process. Fourier Transform Infrared and Raman Spectra confirmed the formation of spinel ferrite crystal structure. X-ray photoelectron spectroscopy revealed the cation redistribution at the tetrahedral and octahedral site in spinel ferrite nanoparticle with change of particle size. This work demonstrates that the particle size and cation redistribution in spinel ferrite nanoparticles synthesized by sonochemical method, is effective way to tune the physical characteristics, and consequently it can receive very promising desired applications. This work was financially supported by the Czech Science Foundation (GA19-23647S)project at CPS.
Menghao Wu is currently a professor in School of Physics, Huazhong University of Science and Technology, China. He received B.S. degree from Nanjing University (2007) and PHD from University of Nebraska-Lincoln (2011). From 2012 to 2014 he had studied in Virginia Commonwealth University and Massachusetts Institute of Technology as postdoctoral fellow. In 2014 he joined in Huazhong University of Science and Technology and became a professor in School of Physics. His current research is focused on 2D ferroelectrics/multiferroicsAbstract
slovak university of technology
Assoc. Prof. Ivan Šalitroš, PhD. was born in Michalovce, Slovakia, in 1982. He received degree of Engineering Bachelor (2004), Engineering Master (2006), and Ph.D (2010) from Slovak University of Technology Bratislava. He is an expert in the field of molecular magnetism and a specialist in the advanced organic, coordination and inorganic synthesis and magnetic as well as photomagnetic experiments. His specialization is molecular design of polydentate ligands, synthesis of coordination compounds and investigation of their structural and magnetic properties.Abstract
The Spin-Crossover (SCO) phenomenon between low-spin (LS) and high-spin (HS) state presents one of the most spectacular examples of molecular bistability. The outstanding position of SCO materials is based on the number of external stimuli, by which change of the spin can be performed. Until now, the most investigated is thermally activated transition of spin, which can be influenced also by other triggers like pressure, magnetic or electric field. Moreover, in the last three decades, the light induced LS↔HS photoconversion (LIESST and reverse LIESST effect) attracts the research interest. Herein we present thermal and light-induced SCO investigation of iron(II)-bis(pyrazolyl)pyridine complexes. In the case of mononuclear compounds, their thermal and photoinduced transition of spin was investigated by magnetic as well as by photocrystallographic experiments [1,2]. Furthermore, novel bis-tridentate N-donor ligands containing the photoactive anthracene moieties were designed and synthetized . The consecutive iron(II) complexation resulted in the formation of oligomeric polynuclear complexes with grid-like or hexagone-like molecular architecture (Fig. 1) . The magnetic investigation revealed half-complete SCO in the case of tetranuclear grid complex and completely HS behaviour of hexadentate compound. Grant agencies (APVV-14-0078, APVV-14-0073, VEGA 1/0125/18) are acknowledged for the financial support.
The University of Tokyo
Dr. Jun Okabayashi received Ph.D degree in Physics in 2002 from the University of Tokyo. From 2003, he was an assistant professor in the university of Tokyo and Tokyo Institute of Technology. Since 2009, he has hold a current position of associate professor in the university of Tokyo. His scientific interests are focused on spectroscopic studies of novel magnetic properties in spintronics materials and magnetic complexes. Especially, his fields of interest are spectroscopic investigations using synchrotron radiation magnetic x-ray absorption spectroscopy in order to unveil the electronic and magnetic structures of novel magnetic materials.Abstract
using synchrotron radiation soft x-ray magnetic circular dichroism for the magnetic thin film interfaces. In the spintronics research fields, the materials possessing perpendicular magnetic anisotropy (PMA), which is originated from spin-orbit coupling at the thin film interfaces, are required for the magnetic storage device applications. I will discuss in this presentation the understanding for interfacial PMA at the Co/Pd interfaces, where the spins in Co and the spin quadrupoles in Pd interact concertedly and make a significant role to PMA . Further, I propose novel concept of ‘orbital-elastic effect’ beyond the classical magneto-elastic effect, which controls the orbital magnetic moment and PMA through the interfacial strain in Ni on BaTiO3 multi-ferroelectric substrate by applying electric field. These findings will open up the new research field of spin-orbitronics in near future . In order to probe these phenomena, I emphasize the importance of soft x-ray synchrotron-radiation spectroscopies.
University of Bucharest
Marilena Ferbinteanu is Associate Professor at the University of Bucharest,Romania.She received her Ph.D. in Inorganic Chemistry from the University of Bucharest in 1998. She was awarded with Alexander von Humboldt Fellowship (1999-2001) and Japan Society for Promotion Science Fellowship (2004-2006). She was Visiting Professor at several universities and institutes. The research in Ferbinteanu-Cimpoesu’s group is focused on the exploration of new areas of the molecular magnetism, from the synthesis and analysis point of view, proposing both a new chemistry and rather inedited theoretical perspectives, with original conceptual and methodological developments.Abstract
B-H curve measurement with distortion analysis along with Barkhausen noise measurement at room temperature.
Vince Jászfi is a PhD Student in materials sciences at Materials Center Leoben Forschung GmbH and Montanuniversität Leoben, where he has been since 2018. He received his B.S. in Hungary from the University of Dunaújváros in 2015, and his M.S from Vienna University of Technology in 2018, and he worked with the Thin Film Group of the Institute of Materials Science and Technology at Vienna University of Technology. He received the professions as mechanic and sales manager in 2009 and 2010. He served as technical sciences teacher at Schülerhilfe GmbH and as mathematics teacher at VHS Wien during 2015-2018. He served as technician at Dr. Josef Zelisko GmbH form 2013 until 2015.Abstract