Linear dependence of skyrmion velocity on response resonance frequency of local magnetization

Spin waves (SWs) have been proven effective in driving the magnetic skyrmion motion, while the physical correlation between skyrmion velocity and the resonance frequency of local magnetization remains unknown. Here, we theoretically investigate the skyrmion motion in a magnetic Co/Pt nanotrack with...

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Veröffentlicht in:Applied physics letters 2020-05, Vol.116 (19)
Hauptverfasser: Kong, Lingwen, Bo, Lan, Zhao, Rongzhi, Hu, Chenglong, Ji, Lianze, Zhang, Yanhui, Zhang, Xuefeng
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Sprache:eng
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Zusammenfassung:Spin waves (SWs) have been proven effective in driving the magnetic skyrmion motion, while the physical correlation between skyrmion velocity and the resonance frequency of local magnetization remains unknown. Here, we theoretically investigate the skyrmion motion in a magnetic Co/Pt nanotrack with the perpendicular magnetic anisotropy, which is driven by SWs. The results show that magnetic skyrmions move along the propagation direction of SWs in a specific frequency range (50–175 GHz). It is evidenced that there is a linear relationship between the response resonance frequency (fr) of local magnetization and the skyrmion velocity (v), and the motion of skyrmions could also be manipulated by controlling the amplitude and location of the exciting source. The present study provides a fundamental insight into understanding the intrinsic physics of SW-driven skyrmion-based devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0004649