Magnetization dynamics induced by Rashba effect in a Permalloy nanodisk
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- 作者：Huanan Li ; Zhong Hua ; jiyonghnli@126.com ; Dongfei Li
- 关键词：Spin-polarized current ; Rashba effect ; Vortex switching
- 刊名：Physica B: Condensed Matter
- 出版年：2017
- 出版时间：15 February 2017
- 年：2017
- 卷：507
- 期：Complete
- 页码：114-118
- 全文大小：711 K
- 卷排序：507
文摘
Magnetic vortex dynamics mediated by spin-polarized ac current of different amplitudes and frequencies are investigated by micromagnetic simulations in a system lacking structure inversion symmetry. Micromagnetic calculations reveal that the critical current density required to induce vortex core reversal may be decreased to below 1010 A m−2 due to strong transverse magnetic field by Rashba effect. We also find the spin torque of ac current plays a trivial role in magnetic vortex dynamics in a broken inversion symmetry system when the current density is on the order of 1010 A m−2 and the current with frequency close to the vortex eigenfrequency is the most efficient for reversal.