Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 91: [MA] Poster II
O 91.7: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
Electronic structure, magnetic and transport properties of Heusler compounds Fe3−xMnxSi(x = 0,..,3) — •Y. Shapiro1, G. H. Fecher1,2, S. Ouardi1, A. Gloskovskii1, B. Balke1, S. Ueda3, and C. Felser1,2 — 1Institute of Inorganic and Analytical Chemistry,Johannes Gutenberg - University, Mainz — 2Max Planck Institute for Chemical Physics of Solids, Dresden — 3NIMS Beamline Station at SPring-8, National Institute for Materials Science, Japan.
Heusler compounds are promising materials in many fields of contemporary research. The spectrum of their possible applications ranges from magnetic and magneto-mechanical materials from semiconductors, thermoelectrics to superconductors. The properties of these intermetallic compounds can be altered by changing the degree and kind of chemical order as well as by substituting one element by another.
The substitutional series of polycrystalline Heusler compounds Fe3−xMnxSi(x = 0,...,3) were synthesized and experimentally investigated with respect to their electronic and crystalline structure as well as magnetic and transport properties. The crystal structure was determined by means of x-ray diffraction. The temperature dependence of electrical resistivity, Seebeck coefficient, and thermal conductivity were investigated. Hard and soft X-ray photoelectron spectroscopy (HAXPES and MgKα XPS) was carried out to study the details of the electronic structure and relate it to the transport properties.