期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 49, 期 19, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/19/195004
关键词
bubble-like magnetic solitons; micromagnetic simulations; Dzyaloshinskii-Moriya interactions; spin-polarized current
资金
- National Basic Research Program of China [2012CB933101]
- National Science Fund of China [51371092, 11574121]
By using micromagnetic simulations, we studied the dynamic response for different bubblelike magnetic solitons in the [CoPt-CoNi]/Cu/CoNi magnetic multilayer with perpendicular magnetic anisotropy. It is found that a localized spin-polarized current can not only nucleate a dissipative magnetic droplet but also excite the in-plane domain wall (DW) oscillation at the edge of bubble-like magnetic solitons. The dependence of oscillation frequency on current for the dissipative magnetic droplet is hysteretic in the absence of the Dzyaloshinskii-Moriya interactions (DMI). In the presence of DMI, three different bubble-like magnetic solitons are excited: (1) singular magnetic droplet, (2) pseudonormal magnetic droplet, (3) dynamical skyrmion. Meanwhile, the oscillation frequencies of these magnetic solitons have different response as current density varies. These results open up new possibilities for the applications of magnetic soliton-based spin transfer nano-oscillators.
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