Regensburg 2022 – wissenschaftliches Programm
KFM 12.6: Vortrag
Dienstag, 6. September 2022, 11:00–11:15, H37
Small-angle neutron scattering of kinetically driven skyrmion lattice motion — •Denis Mettus1, Alfonso Chacon1, Andreas Bauer1, Sebastian Mülbauer2, and Christian Pfleiderer1 — 1Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching, Germany
Skyrmions are topologically non-trivial spin textures that exhibit an exceptionally efficient coupling to spin currents, notably spin-polarized charge currents and magnon currents as observed in MnSi, FeGe, and Cu2OSeO3. This raises the question for the microscopic mechanisms that control the pinning of the skyrmion lattice, and how they depend on the topology, electronic structure, and disorder. We report neutron scattering measurements of kinetically driven skyrmion lattice unpinning and motion by means of Time-Involved Small Angle Neutron scattering Experiment (TISANE). In our study we examined the unpinning process under changing field orientation for different materials including the metallic systems Mn1−xFexSi and the insulator Cu2OSeO3. We discuss our results in the light of methodological aspects of the TISANE technique and recent theoretical predictions of walking skyrmions.