Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Poster Session

TT 71.53: Poster

Mittwoch, 18. März 2015, 15:00–18:00, Poster B

Corbino resistance measurements of the cubic helimagnet MnSi — •Marco Halder, Christoph Schnarr, Andreas Bauer, and Christian Pfleiderer — Technische Universität München, Physik-Department E21, D-85748 Garching, Germany

In recent years the transport properties of the itinerant helimagnet MnSi were heavily investigated. In particular, the topological Hall contribution arising from a regular arrangement of spin whirls, the so-called Skyrmion lattice, attracted great scientific interest. In addition, it was shown that already ultra-low current densities are sufficient to move the magnetic texture leading to emergent electrodynamics. Here, we report measurements on a disk-shaped sample with a coaxial contact arrangement, i.e., in a Corbino geometry, addressing geometrical contributions to the magnetoresistance of MnSi. We report the Corbino resistance of high-quality single crystals of MnSi over a wide range of temperatures from 2 K to 300 K under magnetic fields up to 9 T.