期刊
NANO LETTERS
卷 21, 期 10, 页码 4320-4326出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00865
关键词
skyrmion; topological spin texture; perpendicular magnetic anisotropy; Dzyaloshinskii-Moriya interaction; spintronics; micromagnetics
类别
资金
- JSPS KAKENHI [JP20F20363, JP21H01364]
- Guangdong Special Support Project [2019BT02X030]
- Shenzhen Peacock Group Plan [KQTD20180413181702403]
- Pearl River Recruitment Program of Talents [2017GC010293]
- National Natural Science Foundation of China [11974298, 61961136006]
Magnetic skyrmions are versatile topological excitations that can be used as nonvolatile information carriers, and effective position control of skyrmions in channels is crucial for their application in accumulation and transport. By utilizing engineered energy barriers and wells in a magnetic multilayer film, skyrmions can be attracted or repelled by modified boundaries, allowing for the reliable confinement, accumulation, and transport of skyrmions without destruction at device edges.
Magnetic skyrmions are versatile topological excitations that can be used as nonvolatile information carriers. The confinement of skyrmions in channels is fundamental for any application based on the accumulation and transport of skyrmions. Here, we report a method that allows effective position control of skyrmions in designed channels by engineered energy barriers and wells, which is realized in a magnetic multilayer film by harnessing the boundaries of patterns with modified magnetic properties. We experimentally and computationally demonstrate that skyrmions can be attracted or repelled by the boundaries of areas with modified perpendicular magnetic anisotropy and Dzyaloshinskii-Moriya interaction. By fabricating square and stripe patterns with modified magnetic properties, we show the possibility of building reliable channels for confinement, accumulation, and transport of skyrmions, which effectively protect skyrmions from being destroyed at the device edges. Our results are useful for the design of spintronic applications using either static or dynamic skyrmions.
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