Berlin 2012 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II - Magnetic Heusler compounds, Magnetic shape memory alloys, Thin Films, Micro-/Nano-structured magnetic materials, Graphene, Spins in organics, Magnetic imaging, Surface Magnetism, Spin excitations/Torque, Spincaloric transport

MA 52.7: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Electronic structure, magnetic and transport properties of Heusler compounds Fe_3−xMn_xSi(x = 0,..,3) — •Y. Shapiro¹, G. H. Fecher^1,2, S. Ouardi¹, A. Gloskovskii¹, B. Balke¹, S. Ueda³, and C. Felser^1,2 — 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 Fe_3−xMn_xSi(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 MgK_α XPS) was carried out to study the details of the electronic structure and relate it to the transport properties.