Skyrmion creation and annihilation by spin waves

被引：26
|
作者：
Liu, Yizhou [1 ]
Yin, Gen [1 ]
Zang, Jiadong [2 ,3 ]
Shi, Jing [4 ]
Lake, Roger K. [1 ]
机构：
[1] Univ Calif Riverside, Dept Elect & Comp Engn, Riverside, CA 92521 USA
[2] Univ New Hampshire, Dept Phys, Durham, NH 03824 USA
[3] Univ New Hampshire, Mat Sci Program, Durham, NH 03824 USA
[4] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 15期
关键词：
MAGNETIC SKYRMIONS; WEAK FERROMAGNETISM; CHIRAL MAGNET; DYNAMICS; MOTION;
D O I：
10.1063/1.4933407
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Single skyrmion creation and annihilation by spin waves in a crossbar geometry are theoretically analyzed. A critical spin-wave frequency is required both for the creation and the annihilation of a skyrmion. The minimum frequencies for creation and annihilation are similar, but the optimum frequency for creation is below the critical frequency for skyrmion annihilation. If a skyrmion already exists in the cross bar region, a spin wave below the critical frequency causes the skyrmion to circulate within the central region. A heat assisted creation process reduces the spin-wave frequency and amplitude required for creating a skyrmion. The effective field resulting from the Dzyaloshinskii-Moriya interaction and the emergent field of the skyrmion acting on the spin wave drive the creation and annihilation processes. (C) 2015 AIP Publishing LLC.
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页数：5
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