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首页> 外文期刊>Journal of Physics. Condensed Matter >Description of current-driven torques in magnetic tunnel junctions
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Description of current-driven torques in magnetic tunnel junctions

机译:磁隧道结中电流驱动转矩的描述

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摘要

A free electron description of spin-dependent transport in magnetic tunnel junctions with non-collinear magnetizations is presented. We investigate the origin of transverse spin density in tunneling transport and the quantum interferences which give rise to oscillatory torques on the local magnetization. Spin transfer torque is also analyzed and an important bias asymmetry is found as well as a damped oscillatory behavior. Furthermore, we investigate the influence of the s-d exchange coupling on torque, in particular in the case of half-metallic MTJs, in which the spin transfer torque is due to interfacial spin-dependent reflections.
机译:提出了具有非共线磁化强度的磁性隧道结中自旋相关输运的自由电子描述。我们研究了隧道运输中横向自旋密度的起源以及在局部磁化强度上引起振荡转矩的量子干扰。还分析了自旋传递转矩,发现了重要的偏置不对称性以及阻尼的振荡行为。此外,我们研究了s-d交换耦合对扭矩的影响,特别是在半金属MTJ的情况下,其中自旋传递扭矩是由于界面自旋相关的反射引起的。

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