期刊
PHYSICAL REVIEW B
卷 98, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.134448
关键词
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资金
- National Natural Science Foundation of China [51771127, 51571126, 51772004, 11574137]
- Scientific Research Fund of Sichuan Provincial Education Department [18TD0010, 16CZ0006]
- JSPS RONPAKU (Dissertation Ph.D.) Program
- JSPS KAKENHI [JP18H03676, JP17K05490, JP15H05854, 17K19074, 26600041, 22360122]
- CREST, JST [JP-MJCR16F1]
- MEXT, Japan [17K05511, 17H05173]
- Center for Science and Innovation in Spintronics (Core Research Cluster), Tohoku University
- JSPS
- RFBR under the Japan-Russian Research Cooperative Program
- President's Fund of CUHKSZ
- Shenzhen Key Laboratory Project [ZDSYS201603311644527]
- Shenzhen Fundamental Research Fund [JCYJ20160331164412545, JCYJ20170410171958839]
- Grants-in-Aid for Scientific Research [17K19074, 26600041, 17H05173, 17K05511, 22360122] Funding Source: KAKEN
The dynamics of antiferromagnets is a current hot topic in condensed matter physics and spintronics. However, the dynamics of insulating antiferromagnets cannot be excited by an electric current, which is a method usually used to manipulate ferromagnetic metals. Here, we propose to use the voltage-controlled magnetic anisotropy gradient as an excitation source to manipulate insulating antiferromagnetic textures. We analytically and numerically study the dynamics of an antiferromagnetic skyrmion driven by a magnetic anisotropy gradient. Our analytical calculations demonstrate that such a magnetic anisotropy gradient can effectively drive an antiferromagnetic skyrmion towards the area of lower magnetic anisotropy. The micromagnetic simulations are in good agreement with our analytical solution. Furthermore, the magnetic anisotropy gradient induced velocity of an antiferromagnetic skyrmion is compared to that of a ferromagnetic skyrmion. Our results are useful for the understanding of antiferromagnetic skyrmion dynamics and may open an alternative way for the design of antiferromagnetic spintronic devices.
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