期刊
CURRENT APPLIED PHYSICS
卷 43, 期 -, 页码 72-77出版社
ELSEVIER
DOI: 10.1016/j.cap.2022.08.013
关键词
Magnetic vortex; Magnetic chirality; Magnetization switching; Micromagnetic simulations
资金
- Yichang Natural Science Research project [A22-3-010]
- Fund of Key Laboratory of Advanced Materials of Ministry of Education [ADV21-20]
- Yichang Key Laboratory of Magnetic Functional Materials in China
This paper proposes a new method to control the chirality of magnetic vortices by optimizing the structure of a nanodisk. The results show that the polarity and circulation of the vortices can be controlled simultaneously by changing the direction of the global magnetic field, and the chirality of the vortices can be determined by detecting the stray field distribution on the surface of the nanodisk.
Magnetic vortex has attracted attention in the field of information storage because their topological spin structures with chiral bistable states. If the vortex core polarity and vortex circulation sense can be controlled simultaneously in a nanodisk, which will be more beneficial to realize the multi-bit ultrahigh density storage. In this paper, a reliable control scheme for magnetic vortex chirality is proposed by optimizing the structure of PacMan-like nanodisk. The results show that the polarity and circulation of the vortex can be controlled simultaneously by changing the direction of the global magnetic field, and even the chiral states of the vortex can be determined by detecting the stray field distribution on the surface of the nanodisk. The optimized Pac-Man-like nanodisk provide an experimental method for the control and detection of magnetic vortex chirality, which will be beneficial to the realization of multi-bit magnetic storage or magnetic logic technology in the future.
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