Current-induced magnetic vortex core switching in a Permalloy nanodisk
Current-induced magnetic vortex core switching in a Permalloy nanodisk
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DOI：
10.1063/1.2780107
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发表时间：
2007-09-10
影响因子：
4
通讯作者：
Schneider, C. M.
中科院分区：
文献类型：
--
作者：
Liu, Y.;Gliga, S.;Schneider, C. M.
本文报道了在亚微米坡莫合金薄膜平面上施加短电流脉冲引起的磁涡芯的转换。用包括绝热和非绝热自旋扭矩的微磁模拟来研究电流驱动的磁化动力学。他们预测，十分之一纳秒长的电流爆发可能会引发地核反转。发现涡核反转过程与施加外场脉冲时相同。使用电流脉冲控制涡旋核心的取向，为解决密集阵列中的单个纳米磁体提供了技术上的相关可能性。
The authors report on the switching of a magnetic vortex core in a submicron Permalloy disk, induced by a short current pulse applied in the film plane. Micromagnetic simulations including the adiabatic and nonadiabatic spin-torque terms are used to investigate the current-driven magnetization dynamics. They predict that a core reversal can be triggered by current bursts a tenth of a nanosecond long. The vortex core reversal process is found to be the same as when an external field pulse is applied. The control of a vortex core's orientation using current pulses introduces the technologically relevant possibility to address individual nanomagnets within dense arrays.