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MA: Fachverband Magnetismus

MA 59: Posters Magnetism III

MA 59.8: Poster

Freitag, 20. März 2020, 09:00–12:00, P2/EG

Measurement of magneto-crystalline anisotropies in MnSi by means of torque magnetometry — •Michelle Hollricher, Schorsch Sauther, Vivek Kumar, Andreas Bauer, Marc Wilde, and Christian Pfleiderer — Physik Department, Technische Universität München, D-85748 Garching, Germany

The first observation of a skyrmion lattice was reported a decade ago, in the magnet MnSi [1], stabilized by thermal fluctuations. Recently an independent second skyrmion phase was discovered in a different magnet, Cu₂OSeO₃ [2]. This second novel state can only be observed for fields applied along the <100> axes, highlighting the importance of magneto-crystalline anisotropies. So far, however, further information on the quantitative strength of magnetic anisotropies is scarce [3,4]. We report a comprehensive study of the cubic chiral magnet MnSi using torque magnetometry. We discuss our results in terms of a Ginzburg-Landau description and give an outlook on future studies on related systems.
[1] S. Mühlbauer et al., Science 323, 915-919 (2009)
[2] A. Chacon et al., Nature Phys. 14, 936-941 (2018)
[3] A. Bauer et al., Phys. Rev. B 95, 024429 (2017)
[4] T. Adams et al., Phys. Rev. Lett. 121, 187205 (2018)