Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 25: Magnetic Heusler Compounds
MA 25.3: Vortrag
Mittwoch, 13. März 2013, 10:00–10:15, H10
Transport Investigations of Mn3Si — •Frank Steckel, Steven Rodan, Regina Hermann, Christian G.F. Blum, Sabine Wurmehl, Bernd Büchner, and Christian Heß — Leibniz Institute for Solid State and Materials Research, Dresden, Deutschland
We investigate electronic and thermal transport phenomena of the itinerant antiferromagnet Mn3Si, which has been suggested to be a prototype material for realizing half-metallic antiferromagnetism [1] with a spin density wave below 25 K. We measured a complete set of transport coefficients: the resistivity, the Hall effect as well as the thermal conductivity, the thermopower and the Nernst effect in the temperature range from 10 K up to 300 K. In the vicinity of the antiferromagnetic transition temperature we found pronounced 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.
[1] C. Pfleiderer et al., Phys. Rev. B 65 (2002) 172404