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MA: Fachverband Magnetismus
MA 10: Skyrmions I (joint session MA/KFM/TT)
MA 10.6: Talk
Monday, March 12, 2018, 16:30–16:45, EB 301
Magnetic anisotropy in the itinerant helimagnet MnSi — •Schorsch M. Sauther1, Andreas Bauer1, Dirk Grundler2, Christian Pfleiderer1, and Marc A. Wilde1 — 1Phys.-Dep. E51, TU München — 2LMGN, IMX, STI, EPF Lausanne
We report torque magnetometry in Manganese silicide (MnSi). In our experiment, we employ cantilever magnetometry in a 2D magnetic field B→ = B·(sinϕ cosϕ) to measure the torque τ resulting from the anisotropic magnetization M⊥→ of a high-quality, single-crystalline bulk sample of MnSi. The angular dependence τ(ϕ) displays distinct oscillations with differently pronounced extrema. The oscillation amplitude between several extrema does not saturate for our maximum field of 4.5 T. In the field dependence τ(B) we observe an unexpected hysteresis above Hc2. Furthermore, the hysteretic behavior below Hc2 changes drastically with temperature below Tc. We utilize our observations to determine the anisotropy constants and discuss our results in the context of complementary experiments[1].
[1] A. Bauer et al., Phys. Rev. B 95, 024429 (2017)