Biased quasiballistic spin torque magnetization reversal.

Biased quasiballistic spin torque magnetization reversal.
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偏置准弹道自旋扭矩磁化反转。

DOI:
10.1103/physrevlett.101.087201
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发表时间:
2008
影响因子:
8.6
通讯作者:
H. Schumacher
H. Schumacher
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
S. Serrano;K. Rott;G. Reiss;J. Langer;B. Ocker;H. Schumacher

文献摘要

被引文献

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我们探索了自旋转矩磁化翻转时间的超快极限。在自旋转矩电流脉冲期间的自旋转矩进动以及脉冲之后的自由磁化振荡通过时间分辨磁输运被检测到。使脉冲持续时间与进动周期相适应,可以对磁化的最终取向进行相干控制。在存在硬轴偏置场的情况下,我们发现通过单次进动旋转,从初始平衡态直接到反转平衡态,可以实现最佳的准弹道自旋转矩磁化翻转。
We explore the ultrafast limit of spin torque magnetization reversal time. Spin torque precession during a spin torque current pulse and free magnetization ringing after the pulse is detected by time-resolved magnetotransport. Adapting the duration of the pulse to the precession period allows coherent control of the final orientation of the magnetization. In the presence of a hard axis bias field, we find optimum quasiballistic spin torque magnetization reversal by a single precessional turn directly from the initial to the reversed equilibrium state.