Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 4: Skyrmions I (joint session MA/KFM/TT)
KFM 4.3: Vortrag
Montag, 12. März 2018, 15:45–16:00, EB 301
Small angle neutron scattering experiments of skyrmions far from equilibrium — •Alfonso Chacon1, Marco Halder1, Andreas Bauer1, Wolfgang Simeth1, André Heinemann2, Sebastian Mühlbauer2, and Christian Pfleiderer1 — 1Physik Department, Technische Universität München, Germany — 2Heinz Maier-Leibnitz Zentrum, Garching, Germany
The prospect of the application of magnetic skyrmions in next-generation spintronic devices has recently created substantial scientific interest in this type of magnetic order. Stabilized by thermal fluctuations closed to the paramagnetic order, skyrmion lattices in cubic chiral magnets are constrained to a small window a few Kelvin wide. Recent developments have demonstrated how to expand this regime down to low temperatures by means of supercooling, electrical fields, or uniaxial pressure. Thus, it is possible to study this topological type of magnetism far from equilibrium. We report detailed small angle neutron scattering experiments on skyrmion lattices in B20 compounds at very low temperatures stabilized through fast cooling and discuss the role of disorder and magnetocrystalline anisotropies in their stabilization.