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arXiv · 1911.01987

Engineering the dynamics of topological spin textures by anisotropic spin-orbit torques

Jan-Philipp Hanke·Frank Freimuth·Bertrand Dupé·Jairo Sinova·Mathias Kläui·Yuriy Mokrousov
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Abstract

Integrating topologically stabilized magnetic textures such as skyrmions as nanoscale information carriers into future technologies requires the reliable control by electric currents. Here, we uncover that the relevant skyrmion Hall effect, which describes the deflection of moving skyrmions from the current flow direction, acquires important corrections owing to anisotropic spin-orbit torques that alter the dynamics of topological spin structures. Thereby, we propose a viable means for manipulating the current-induced motion of skyrmions and antiskyrmions. Based on these insights, we demonstrate by first-principles calculations and symmetry arguments that the motion of spin textures can be tailored by materials design in magnetic multilayers of Ir/Co/Pt and Au/Co/Pt. Our work advances the understanding of the current-induced dynamics of these magnetic textures, which underlies a plethora of memory and logic applications.

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Jan-Philipp Hanke, Frank Freimuth, Bertrand Dupé, Jairo Sinova, Mathias Kläui, Yuriy Mokrousov. 2019-11-05. Engineering the dynamics of topological spin textures by anisotropic spin-orbit torques. https://doi.org/10.1103/physrevb.101.014428

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