Micromagnetic simulation of spin transfer torque switching combined with precessional motion from a hard axis magnetic field
Micromagnetic simulation of spin transfer torque switching combined with precessional motion from a hard axis magnetic field
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自旋转移矩切换与难轴磁场进动运动相结合的微磁模拟
DOI：
10.1063/1.2422879
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Katine
中科院分区：
文献类型：
--
作者：
K. Ito;T. Devolder;C. Chappert;M. Carey;J. Katine
作者们对自旋转移矩（STT）翻转进行了微磁模拟，并结合了由脉冲或静态硬轴场诱导的进动。他们发现，在存在进动的情况下，STT翻转所需的电流显著降低。特别是，当硬轴场超过自由层矫顽力的四分之一时，翻转电流可降低至直流下的零温度阈值电流以下。模拟表明，临界电流的降低源于在最初的几次进动旋转期间，当磁化强度几乎穿过硬轴时存在的强大的STT。
The authors have performed micromagnetic simulations of spin transfer torque (STT) switching, combined with precessional motion induced by a pulsed or static hard axis field. They have found a significant reduction in the current required for STT switching in the presence of precessional motion. In particular, the switching current can be reduced below the zero-temperature threshold current at dc, when the hard axis field exceeds a fourth of the free layer coercivity. The simulations indicate that the critical current reduction arises from the strong STT present when the magnetization nearly passes through the hard axis during the initial few precessional turns.