Acoustic-driven magnetic skyrmion motion

Yang Yang, Le Zhao, Di Yi, Teng Xu, Yahong Chai, Chenye Zhang, Dingsong Jiang, Yahui Ji, Dazhi Hou, Wanjun Jiang (), Jianshi Tang, Pu Yu, Huaqiang Wu and Tianxiang Nan ()
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Yang Yang: Tsinghua University
Le Zhao: Tsinghua University
Di Yi: Tsinghua University
Teng Xu: Tsinghua University
Yahong Chai: Tsinghua University
Chenye Zhang: Tsinghua University
Dingsong Jiang: Tsinghua University
Yahui Ji: Tsinghua University
Dazhi Hou: University of Science and Technology of China
Wanjun Jiang: Tsinghua University
Jianshi Tang: Tsinghua University
Pu Yu: Tsinghua University
Huaqiang Wu: Tsinghua University
Tianxiang Nan: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Magnetic skyrmions have great potential for developing novel spintronic devices. The electrical manipulation of skyrmions has mainly relied on current-induced spin-orbit torques. Recently, it was suggested that the skyrmions could be more efficiently manipulated by surface acoustic waves (SAWs), an elastic wave that can couple with magnetic moment via the magnetoelastic effect. Here, by designing on-chip piezoelectric transducers that produce propagating SAW pulses, we experimentally demonstrate the directional motion of Néel-type skyrmions in Ta/CoFeB/MgO/Ta multilayers. We find that the shear horizontal wave effectively drives the motion of skyrmions, whereas the elastic wave with longitudinal and shear vertical displacements (Rayleigh wave) cannot produce the motion of skyrmions. A longitudinal motion along the SAW propagation direction and a transverse motion due to topological charge are simultaneously observed and further confirmed by our micromagnetic simulations. This work demonstrates that acoustic waves could be another promising approach for manipulating skyrmions, which could offer new opportunities for ultra-low power skyrmionics.

Date: 2024
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DOI: 10.1038/s41467-024-45316-w

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