期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.197205
关键词
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资金
- National Key R&D Program of China [2017YFA0303201]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH009]
- Key Research Program of Chinese Academy of Sciences [KJZD-SW-M01]
- Natural Science Foundation of China [51622105, 11474290]
- Youth Innovation Promotion Association CAS [2015267]
- European Union through Marie Curie Initial Training Network SIMDALEE2
- European Research Council Seventh Framework Programme/ ERC Grant [320832]
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0016424]
- European Research Council (ERC) [320832] Funding Source: European Research Council (ERC)
A target Skyrmion is a flux-closed spin texture that has twofold degeneracy and is promising as a binary state in next generation universal memories. Although its formation in nanopatterned chiral magnets has been predicted, its observation has remained challenging. Here, we use off-axis electron holography to record images of target Skyrmions in a 160-nm-diameter nanodisk of the chiral magnet FeGe. We compare experimental measurements with numerical simulations, demonstrate switching between two stable degenerate target Skyrmion ground states that have opposite polarities and rotation senses, and discuss the observed switching mechanism.
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