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TT: Fachverband Tiefe Temperaturen

TT 44: Poster Session Correlated Electrons

TT 44.81: Poster

Thursday, March 17, 2011, 10:00–13:00, P1

Polarized electron currents in the helical magnet MnSi — •Pascal Krautscheid, Karin Everschor, Markus Garst, and Achim Rosch — Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln

The Dzyaloshinskii-Moriya interaction in MnSi results in the formation of helical magnetic phases and even the stabilization of Skyrmion configurations at low temperatures [1]. A polarized electron current couples efficiently to such twisted magnetic structures giving rise to pronounced spin-torques transfer phenomena [2]. We study the interaction of spin currents with the magnetic texture in MnSi in the framework of the Landau-Lifshitz-Gilbert equation. Particular emphasis is put on the influence of spin currents on the pitch of the magnetic helix and its pinning by the underlying crystal structure of MnSi.
S. Mühlbauer et al., Science 323, 915 (2009).
F. Jonietz et al., Science, to be published (2010).