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Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 54: Spin Hall Effects and Skyrmions II

MA 54.5: Vortrag

Donnerstag, 23. März 2017, 16:00–16:15, HSZ 04

Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy — •Kai Litzius1,2,3, Ivan Lemesh4, Benjamin Krüger1, Pedram Bassirian1, Lucas Caretta4, Kornel Richter1, Felix Büttner4, Koji Sato5, Oleg A. Tretiakov5,6, Johannes Förster3, Robert M. Reeve1, Markus Weigand3, Iuliia Bykova3, Hermann Stoll3, Gisela Schütz3, Geoffrey S. D. Beach4, and Mathias Kläui1,21Institute of Physics, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany — 3Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany — 4Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA — 5Tohoku University, Sendai 980-8577, Japan — 6School of Natural Sciences, Far Eastern Federal University, Vladivostok

Magnetic skyrmions are topologically stabilized nanoscale spin structures that show promise for future spintronic devices if they can be moved reliably. Employing scanning transmission x-ray microscopy, we demonstrate reproducible skyrmion trajectories at room temperature in ultrathin multilayer films driven by spin orbit torques [1]. We identify a sizeable skyrmion Hall effect that depends on the velocity, which is not captured using the previously used rigid skyrmion model. We explain our observation based on eigenmode excitations that deform the skyrmion during motion [1].

[1] K. Litzius et al., Nature Physics (in press 2016), arxiv:1608.07216.

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