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TT: Fachverband Tiefe Temperaturen

TT 45: Skyrmions III (joint session MA/TT)

TT 45.12: Vortrag

Mittwoch, 18. März 2020, 18:00–18:15, POT 6

Magnetic anisotropy in the itinerant helimagnet MnSi — •Schorsch Michael Sauther¹, Michelle Hollricher¹, Vivek Kumar¹, Andreas Bauer¹, Markus Garst², Dirk Grundler³, Christian Pfleiderer¹, and Marc Andreas Wilde¹ — ¹Phys.-Dept. E51, TU München — ²TFP, KIT, Karlsruhe — ³LMGN, IMX, STI, EPF Lausanne

We report torque magnetometry in Manganese silicide (MnSi). In our experiments, we employ different implementations of cantilever magnetometry to measure the torque τ resulting from the anisotropic magnetization M_⊥^→ of a high-quality, single-crystalline bulk sample of MnSi. The angular dependence of τ displays distinct oscillations with differently pronounced extrema im compliance with an effective Landau potential for the magnetization. This minimal model allows us to extract the anisotropy constant directly from the τ(φ) curve. We study its dependence on field magnitude and temperature in the vicinity of the material’s modulated phases and discuss our results in the context of complementary experiments [1,2].
[1] A. Bauer et al., Phys. Rev. B 95, 024429 (2017)
[2] T. Adams et al., Phys. Rev. Lett. 121, 187205 (2018)