Journal
NANO LETTERS
Volume 19, Issue 1, Pages 353-361Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b03983
Keywords
Skyrmions; skyrmion bubbles; electric field effects; perpendicular magnetic anisotropy; spintronics; micromagnetics
Categories
Funding
- Chinese University of Hong Kong, Shenzhen (CUHKSZ)
- JSPS KAKENHI [JP18H03676, JP17K05490, JP15H05854, 15H05702, 17K19074, 26600041, 22360122]
- CREST, JST [JPMJCR16F1, JPMJCR1874]
- National Key R&D Program of China [2017YFA0206200, 2016YFA0302300]
- National Natural Science Foundation of China [11774194, 51831005, 11574137]
- 1000-Youth talent program of China
- State Key Laboratory of Low Dimensional Quantum Physics
- Beijing Advanced Innovation Center for Future Chip (ICFC)
- NTU-JSPS
- CUHKSZ
- Shenzhen Fundamental Research Fund [JCYJ20160331164412545, JCYJ20170410171958839]
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Magnetization dynamics driven by an electric field could provide long-term benefits to information technologies because of its ultralow power consumption. Meanwhile, the Dzyaloshinskii-Moriya interaction in interfacially asymmetric multilayers consisting of ferromagnetic and heavy-metal layers can stabilize topological spin textures, such as chiral domain walls, skyrmions, and skyrmion bubbles. These topological spin textures can be controlled by an electric field and hold promise for building advanced spintronic devices. Here, we present an experimental and numerical study on the electric field-induced creation and directional motion of topological spin textures in magnetic multilayer films and racetracks with thickness gradient and interfacial Dzyaloshinskii-Moriya interaction at room temperature. We find that the electric field-induced directional motion of chiral domain wall is accompanied by the creation of skyrmion bubbles at certain conditions. We also demonstrate that the electric field variation can induce motion of skyrmion bubbles. Our findings may provide opportunities for developing skyrmion-based devices with ultralow power consumption.
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