Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 34: Skyrmions II (joint session MA/TT)
MA 34.5: Talk
Wednesday, March 18, 2020, 10:45–11:00, POT 6
Current-driven magnetic Skyrmions in constrained geometries — •Martin Stier1, Richard Strobel1, Wolfgang Häusler2, and Michael Thorwart1 — 1Universität Hamburg, Jungiusstraße 9, 20355 Hamburg — 2Universität Augsburg, Universitätsstr. 1, 86135 Augsburg
From a principle point of view, magnetic Skyrmions are ultimately stable and thus do basically not interact with their environment. This is in stark contrast to experimental findings, where Skyrmions are strongly influenced by the shape, roughness and the quality of the sample. We show how the current-driven dynamics and the number of Skyrmions are influenced by geometric constrictions in the wire, its edge roughness and magnetic impurities within the material. We discuss several scenarios in detail, e.g., Skyrmion trapping or acceleration, and Skyrmion destruction or creation. These findings may help to develop tailored microscopic memory devices involving Skyrmions.