Tamas Varga, Ph.D.Senior Research Scientist, WR Wiley Environmental Molecular Sciences Laboratory, Interface Spectroscopy/Diffraction
http://emslbios.pnl.gov/id/varga_t Updated: March 16, 2010
Current Activities and Projects
Tamas Varga supports the x-ray diffraction (XRD) user program at EMSL, maintains the XRD facilities in part, and develops his own research program utilizing EMSL's capabilities and possibilities for collaborative research. He is now in charge of XRD characterization of users' powder, thin film, etc. samples, and started collaborations in different projects including thin-film growth and characterization of new multiferroic materials, the thermodynamics of lithium hydrotalcites, characterization of catalyst materials, as well as x-ray capability development.
Tamas Varga is a solid state chemist, who has been conducting research on different complex solid oxides (negative thermal expansion (NTE) materials, multiferroics, magnetic materials), and polymer-derived ceramics (PDCs). During his research he has extensively used x-ray and neutron radiation to study the structure of matter. His work involved extreme environments, such as heat (solid state synthesis, high-temperature calorimetry, etc.), and pressure (high-pressure synthesis) for materials synthesis and characterization. His most important accomplishments are (i) his contribution to the understanding of phase transformations in NTE materials, (ii) his findings about the energetics of NTE and PDC materials, as well as (iii) his work on titanates with potential multiferroic properties. He also did pioneering work involving the simultaneous application of in situ synchrotron x-ray diffraction and x-ray absorption spectroscopy for materials studies.
Tamas Varga's past work experience includes graduate research on the synthesis and characterization of low and negative thermal expansion materials (GA Tech, Ph.D. Thesis, 2000-2005), thermochemistry of NTE materials and PDCs (UC Davis, postdoc, 2005-2007), and high-pressure synthesis and characterization of complex magnetic oxides, superconductors, and multiferroics (Argonne National Lab, postdoc, 2007-2009). Characterization work involved the extensive use of x-rays, neutrons, thermal analysis, electron microscopy, and physical property (conductivity, magnetism) characterization tools. He is a contributing editor to Phase Equilibria Diagrams by the American Ceramic Society. Tamas Varga was awarded two grants by petrochemical company TVK to support his undergraduate and, later, his postgraduate studies in Hungary.
Ph.D. in Chemistry (Georgia Institute of Technology)
M.S. in Chemistry (University of Debrecen, Hungary)
M.S. in Economics (University of Miskolc, Hungary)
Awards, Honors, & Appointments
Member of the American Chemical Society and the American Physical Society.