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arXiv 1909.04418cond-mat.supr-concond-mat.mes-hall
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超导/铁磁双层膜中的热致自旋转移矩

Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers

I. V. Bobkova, A. M. Bobkov, Wolfgang Belzig

摘要:

热致磁化动力学由于其在信息技术中的潜在应用而成为当前研究的热点。研究了热梯度中磁畴壁与相邻超导体相互作用的范型系统。由于超导体中的巨热电效应和等自旋对的产生的联合作用,在该系统中产生的自旋转移力矩大到足以引起比先前预测大$10^3$倍的高畴壁速度。

英文摘要:

Thermally induced magnetization dynamics is currently a flourishing field of research due to its potential application in information technology. We study the paradigmatic system of a magnetic domain wall in a thermal gradient which is interacting with an adjacent superconductor. The spin-transfer torques arising in this system due to the combined action of the giant thermoelectric effect and the creation of equal-spin pairs in the superconductor are large enough to give rise to high domain wall velocities $10^3$ times larger than previously predicted.

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