SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Skyrmions III
MA 35.3: Vortrag
Donnerstag, 30. März 2023, 10:00–10:15, HSZ 04
Geometry-induced motion of magnetic skyrmions in curved ferro- and antiferromagnetic films — •Kostiantyn V. Yershov1,2, Attila Kákay3, and Volodymyr P. Kravchuk2,4 — 1Leibniz Institute for Solid State and Materials Research, Dresden, Germany — 2Bogolyubov Institute for Theoretical Physics, Kyiv, Ukraine — 3Helmholtz-Zentrum Dresden-Rossendorf e.V., Institute of Ion Beam Physics and Materials Research, Germany — 4Institut für Theoretische Festkörperphysik, Karlsruher Institut für Technologie, Germany
Here, we present the effect of the spontaneous drift of a magnetic skyrmion in curved films under the action of the curvature gradients without any external stimuli [1]. The strength of the curvature-induced driving is determined by the type of the intrinsic Dzyaloshinskii–Moriya interaction, while the trajectory is determined by the type of magnetic ordering: ferro- or antiferromagnetic. Using rigid particle approximation, we show that for the case of Néel skyrmion the driving force is linear with respect to the gradient of the curvature, while for Bloch skyrmion the driving is proportional to the product of mean curvature and its gradient. During the motion along the surface, skyrmion experiences deformation which depends on the skyrmion type. Equations of motion for Néel and Bloch magnetic skyrmions in curved ferromagnetic and antiferromagnetic materials are obtained in terms of collective variables. [1] K. Yershov et al, PRB 105 (2022), 054425.