几何结构对电流驱动纳米带内磁斯格明子移动特性的影响

doi:10.11896/cldb.21010203

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Abstract Aprecise control of the skyrmion motion is necessary for the research and development of next-generation spintronic devices. For the current-induced magnetic skyrmion motion, the small skyrmion motion velocity and transverse motion of skrymion are still bottlenecks in the technology application. Current-induced skyrmion motion in the nanostripes with different structures were studied based on the micromagnetism simulation. For the current-induced skyrmion motion in the nanostripe, there are the maximum injection current J_max and maximum velocity V_max. In the rectangle nanostripe, the J_max and V_max are relatively small. For the groove nanostripes obtained by the taped the center of rectangle nanostripe, the J_max and V_max can be significantly increased compared with those of the rectangle nanostripe. However, the ratio of the velocity and injection current density V_x/J, which reflects the driving efficiency, is relatively low. It is firstly proposed that guided nanostripe is formed by tapering the edge of nanostripe to improve V_x/J. In the guided nanostripe, the V_x/J can be significantly increased. The J_max and V_max have also been increased to some extent. An optimum channel for skyrmions is a combined nanostripe which has the advantages of guided and groove nanopstripe combined. In the combined nanostripe, the V_x/J is improved, and a larger current density can be injected to obtain a higher motion velocity. The results give guidance for the design and development of spintronic devices based on nanostripes.

Key words： magnetic skyrmion nanostripe micromagnetic simulation spin-polarized current spintronic devices

Published: 25 June 2022 Online: 2022-06-24

CLC number:

O482. 51

Fund:National Natural Science Foundation of China (11604091, 11547186, 11947088) and the Natural Science Foundation of Hunan Province (2018JJ2019).

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	ZHANG Guangfu
	TAN Weishi
	ZHANG Saiwen
	WEN Bing

Cite this article:

ZHANG Guangfu,TAN Weishi,ZHANG Saiwen, et al. Effect of Geometric Structure on Current-induced Magnetic Skyrmion Motion in Nanostripes[J]. Materials Reports, 2022, 36(12): 21010203-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21010203 OR http://www.mater-rep.com/EN/Y2022/V36/I12/21010203

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