Spin-transfer pulse switching: From the dynamic to the thermally activated regime
Spin-transfer pulse switching: From the dynamic to the thermally activated regime
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DOI：
10.1063/1.3532960
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发表时间：
2010-12-27
影响因子：
4
通讯作者：
Kent, A. D.
中科院分区：
文献类型：
--
作者：
Bedau, D.;Liu, H.;Kent, A. D.
在一个单轴薄膜纳米磁体的模型系统中，研究了热涨落对自旋转移开关的影响。纳米磁体被合并到自旋阀纳米柱中，该纳米柱受到幅度和持续时间可变的自旋极化电流脉冲的影响。明显区分了两个物理区域：长脉冲宽度区域和短时间大脉冲幅度区域，在长脉冲持续区域中，通过自旋转移辅助热势垒的热激活发生反转；在短时间大脉冲幅度区域中，开关几率由电流脉冲中的自旋角动量决定。(C)2010年美国物理研究所。[DOI：10.1063/1.3532960]
The effect of thermal fluctuations on spin-transfer switching has been studied for a broad range of time scales (subnanoseconds to seconds) in a model system, a uniaxial thin film nanomagnet. The nanomagnet is incorporated into a spin-valve nanopillar, which is subject to spin-polarized current pulses of variable amplitude and duration. Two physical regimes are clearly distinguished: a long pulse duration regime, in which reversal occurs by spin-transfer assisted thermal activation over an energy barrier, and a short-time large pulse amplitude regime, in which the switching probability is determined by the spin-angular momentum in the current pulse. (C) 2010 American Institute of Physics. [doi:10.1063/1.3532960]