Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets

doi:10.1088/1674-1056/ac6db1

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 77504-077504.doi: 10.1088/1674-1056/ac6db1

Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets

Yaodong Wu(吴耀东)^1,3, Jialiang Jiang(蒋佳良)³, and Jin Tang(汤进)^2,3,†

1 School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China;
2 School of Physics and Optoelectronics Engineering Science, Anhui University, Hefei 230601, China;
3 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

收稿日期:2022-03-18 修回日期:2022-04-24 接受日期:2022-05-07 出版日期:2022-06-09 发布日期:2022-07-19
通讯作者: Jin Tang E-mail:jintang@ahu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12174396 and 12104123).

Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets

Yaodong Wu(吴耀东)^1,3, Jialiang Jiang(蒋佳良)³, and Jin Tang(汤进)^2,3,†

1 School of Physics and Materials Engineering, Hefei Normal University, Hefei 230601, China;
2 School of Physics and Optoelectronics Engineering Science, Anhui University, Hefei 230601, China;
3 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Received:2022-03-18 Revised:2022-04-24 Accepted:2022-05-07 Online:2022-06-09 Published:2022-07-19
Contact: Jin Tang E-mail:jintang@ahu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 12174396 and 12104123).

摘要/Abstract

摘要： We report dynamics of skyrmion bubbles driven by spin-transfer torque in achiral ferromagnetic nanostripes using micromagnetic simulations. In a three-dimensional uniaxial ferromagnet with a quality factor that is smaller than 1, the skyrmion bubble is forced to stay at the central nanostripe by a repulsive force from the geometry border. The coherent motion of skyrmion bubbles in the nanostripe can be realized by increasing the quality factor to ～ 3.8. Our results should propel the design for future spintronic devices such as artificial neural computing and racetrack memory based on dipole-stabilized skyrmion bubbles.

关键词: skyrmion bubbles, dynamic motion, artificial neural computing

Abstract: We report dynamics of skyrmion bubbles driven by spin-transfer torque in achiral ferromagnetic nanostripes using micromagnetic simulations. In a three-dimensional uniaxial ferromagnet with a quality factor that is smaller than 1, the skyrmion bubble is forced to stay at the central nanostripe by a repulsive force from the geometry border. The coherent motion of skyrmion bubbles in the nanostripe can be realized by increasing the quality factor to ～ 3.8. Our results should propel the design for future spintronic devices such as artificial neural computing and racetrack memory based on dipole-stabilized skyrmion bubbles.

Key words: skyrmion bubbles, dynamic motion, artificial neural computing

中图分类号: (Domain walls and domain structure)

75.60.Ch

Yaodong Wu(吴耀东), Jialiang Jiang(蒋佳良), and Jin Tang(汤进). Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets[J]. 中国物理B, 2022, 31(7): 77504-077504.

Yaodong Wu(吴耀东), Jialiang Jiang(蒋佳良), and Jin Tang(汤进). Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets[J]. Chin. Phys. B, 2022, 31(7): 77504-077504.

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Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets

Current-driven dynamics of skyrmion bubbles in achiral uniaxial magnets

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