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arXiv · 1511.04630

Generation of magnetic skyrmion bubbles by inhomogeneous spin Hall currents

Olle Heinonen·Wanjun Jiang·Hamoud Somaily·Suzanne G. E. te Velthuis·Axel Hoffmann
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Abstract

Recent experiments have shown that magnetic skyrmion bubbles can be generated and injected at room temperature in thin films [W. Jiang et al, Science vol. 349, 283 (2015)]. Here, we demonstrate, using micromagnetic modeling, that such skyrmions can be generated by an inhomogeneous spin Hall torque in the presence of Dzyaloshinskii-Moriya interactions (DMIs). In the experimental Ta/Co$_{20}$Fe$_{60}$B$_{20}$ thin films, the DMI is rather small; nevertheless, the skyrmion bubbles are stable, or at least metastable on observational time scales.

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Olle Heinonen, Wanjun Jiang, Hamoud Somaily, Suzanne G. E. te Velthuis, Axel Hoffmann. 2016-03-22. Generation of magnetic skyrmion bubbles by inhomogeneous spin Hall currents. https://doi.org/10.1103/physrevb.93.094407

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