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 52.8: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
Transport investigations on Mn3Si — •Frank Steckel, Regina Hermann, Christian G. F. Blum, Steven Rodan, Sabine Wurmehl, Christian Hess, and Bernd Büchner — Leibniz-Institute for Solid State and Materials Research, Dresden, Germany
We investigate the electronic and thermal transport phenomena of the itinerant antiferromagnet Mn3Si, which has been suggested to be a prototype material for realizing half-metallic ferromagnetism with a spin density wave below 26 K. We measured the resistivity, the Hall-effect as well as the thermal conductivity and the thermopower in the temperature range from 10 K up to 300 K using single crystals. In the vicinity of the antiferromagnetic transition temperature we found clear anomalies in the transport coefficients and a large fluctuation regime which extends to temperatures much higher (up to about 150 K) than the antiferromagnetic ordering temperature.