Distribution of the magnetization reversal duration in subnanosecond spin-transfer switching
Distribution of the magnetization reversal duration in subnanosecond spin-transfer switching
复制标题
亚纳秒自旋转移翻转中磁化反转持续时间的分布
DOI：
10.1103/physrevb.75.064402
复制
发表时间：
2006
影响因子：
3.7
通讯作者：
K. Ito
中科院分区：
文献类型：
--
作者：
T. Devolder;C. Chappert;J. Katine;M. Carey;K. Ito
研究了亚纳秒级电流脉冲在柱状自旋阀中引起的自旋转移开关的开关时间分布。导致开关的脉冲持续时间遵循梳状分布，在几个最可能的，规则间隔的开关持续时间多峰。这些持续时间反映了岁差性质的开关，这是通过一个波动的整数倍的岁差周期。考虑到初始磁化方向的热变化和可能磁化轨迹中总扭矩消失的发生，这可以建模。偏置自旋阀与硬轴场防止这些事件中的一些，并可以提供一个几乎完美的再现性的切换持续时间。
We study the distribution of switching times in spin-transfer switching induced by sub-ns current pulses in pillar-shaped spin-valves. The pulse durations leading to switching follow a comb-like distribution, multiply-peaked at a few most probable, regularly spaced switching durations. These durations reflect the precessional nature of the switching, which occurs through a fluctuating integer number of precession cycles. This can be modeled considering the thermal variance of the initial magnetization orientations and the occurrence of vanishing total torque in the possible magnetization trajectories. Biasing the spin-valve with a hard axis field prevents some of these occurrences, and can provide an almost perfect reproducibility of the switching duration.
影响因子：
64.8
作者：
Saitoh, E;Miyajima, H;Tatara, G
通讯作者：
Tatara, G