Generation of magnetic skyrmion bubbles by inhomogeneous spin Hall currents

被引:42
作者
Heinonen, Olle [1 ,2 ]
Jiang, Wanjun [1 ]
Somaily, Hamoud [1 ,3 ]
te Velthuis, Suzanne G. E. [1 ]
Hoffmann, Axel [1 ]
机构
[1] Argonne Natl Lab, Div Mat Sci, Lemont, IL 60439 USA
[2] Northwestern Argonne Inst Sci & Engn, Evanston, IL 60208 USA
[3] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA
关键词
D O I
10.1103/PhysRevB.93.094407
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Recent experiments have shown that magnetic skyrmion bubbles can be generated and injected at room temperature in thin films [W. Jiang et al., Science 349, 283 (2015)]. Here, we demonstrate, using micromagnetic modeling, that such skyrmions can be generated by an inhomogeneous spin Hall torque in the presence of Dzyaloshinskii-Moriya interactions (DMIs). In the experimental Ta/Co20Fe60B20 thin films, the DMI is rather small; nevertheless, the skyrmion bubbles are stable, or at least metastable on observational time scales.
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页数:6
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