SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 7: Skyrmions I (joint session MA/KFM)
MA 7.7: Vortrag
Mittwoch, 29. September 2021, 11:45–12:00, H5
Exploring the phase diagram of thin film MnSi — •Grace Causer1, Maria Azhar2, Alfonso Chacon1, Andreas Bauer1, Thorsten Hesjedal3, Markus Garst2, and Christian Pfleiderer1 — 1Physics Department, Technical University of Munich, Garching, Germany — 2Institute for Theoretical Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany — 3Clarendon Laboratory, University of Oxford, Oxford, United Kingdom
We have charted the magnetic phase diagram of thin film MnSi grown on a Si substrate via the magnetisation, magnetic susceptibility, planar Hall, and small-angle neutron scattering data, tracking carefully the field and temperature history. Our experimental results are supported by micromagnetic simulations, which jointly reveal a magnetic phase diagram dominated by a field-induced unwinding of an out-of-plane propagating helical wavevector. Below 2 K a discrete phase regime can be discerned unambiguously. These observations provide insights into the integral role of magnetic anisotropy and dimensionality on the low-temperature phase diagram of thin film MnSi.