Magnetic skyrmions are promising candidates for next-generation information carriers. Many concepts and prototypes for skyrmion-based devices have been proposed, and most of the studies are based on the motion of isolated skyrmion. Nevertheless, so far, a comprehensive research of multi-skyrmion motion and related device design are still lacking. In this work, a skyrmion subtracter and a skyrmion diverter based on multi-skyrmion motion are numerically demonstrated in a voltage-gated synthetic antiferromagnetic racetrack. It shows that the number of skyrmions along an array n can be subtracted by an integer from 1 to n by proper control of the driving current density and the voltage-controlled magnetic anisotropy in a narrow racetrack, realizing the function of a skyrmion subtracter. Moreover, when the width of racetrack increases, a single array of skyrmions along the racetrack direction can redistribute along the voltage gate due to the blocking effect of the voltage-controlled magnetic anisotropy. As a result, the single array of skyrmions can split into several arrays, realizing the function of a skyrmion diverter. Our results thus provide guidelines for designing novel racetrack-type skyrmionic devices.
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Realization of skyrmion subtracter and diverter in a voltage-gated synthetic antiferromagnetic racetrack
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14 February 2019
Research Article|
February 13 2019
Realization of skyrmion subtracter and diverter in a voltage-gated synthetic antiferromagnetic racetrack
Qiang Sheng;
Qiang Sheng
1
Shenzhen Key Laboratory of Advanced Materials, Shenzhen Engineering Lab of Flexible Transparent Conductive Films, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology
, Shenzhen 518055, China
2
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University
, Guangzhou 510275, China
3
Micro and Nano Physics and Mechanics Research Laboratory, School of Physics and Engineering, Sun Yat-Sen University
, Guangzhou 510275, China
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X. L. Liu
;
X. L. Liu
a)
1
Shenzhen Key Laboratory of Advanced Materials, Shenzhen Engineering Lab of Flexible Transparent Conductive Films, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology
, Shenzhen 518055, China
a)Authors to whom correspondence should be addressed: xiangliliu@hit.edu.cn and zhengy35@mail.sysu.edu.cn
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W. J. Chen;
W. J. Chen
2
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University
, Guangzhou 510275, China
3
Micro and Nano Physics and Mechanics Research Laboratory, School of Physics and Engineering, Sun Yat-Sen University
, Guangzhou 510275, China
4
School of Materials, Sun Yat-Sen University
, Guangzhou 510275, China
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M. Y. Li;
M. Y. Li
1
Shenzhen Key Laboratory of Advanced Materials, Shenzhen Engineering Lab of Flexible Transparent Conductive Films, Department of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology
, Shenzhen 518055, China
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L. J. Liu;
L. J. Liu
2
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University
, Guangzhou 510275, China
3
Micro and Nano Physics and Mechanics Research Laboratory, School of Physics and Engineering, Sun Yat-Sen University
, Guangzhou 510275, China
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Yue Zheng
Yue Zheng
a)
2
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University
, Guangzhou 510275, China
3
Micro and Nano Physics and Mechanics Research Laboratory, School of Physics and Engineering, Sun Yat-Sen University
, Guangzhou 510275, China
a)Authors to whom correspondence should be addressed: xiangliliu@hit.edu.cn and zhengy35@mail.sysu.edu.cn
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a)Authors to whom correspondence should be addressed: xiangliliu@hit.edu.cn and zhengy35@mail.sysu.edu.cn
J. Appl. Phys. 125, 064502 (2019)
Article history
Received:
July 30 2018
Accepted:
January 22 2019
Citation
Qiang Sheng, X. L. Liu, W. J. Chen, M. Y. Li, L. J. Liu, Yue Zheng; Realization of skyrmion subtracter and diverter in a voltage-gated synthetic antiferromagnetic racetrack. J. Appl. Phys. 14 February 2019; 125 (6): 064502. https://doi.org/10.1063/1.5050368
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