Evidence for thermal spin-transfer torque.
Evidence for thermal spin-transfer torque.
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DOI：
10.1103/physrevlett.104.146601
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发表时间：
2010-03
影响因子：
8.6
通讯作者：
Haiming Yu;S. Granville;Dapeng Yu;J. Ansermet
中科院分区：
文献类型：
--
作者：
Haiming Yu;S. Granville;Dapeng Yu;J. Ansermet
在位于Cu纳米线中间的Co/Cu/Co自旋阀中获得了大的热流。二次谐波电压对外加电流的响应被用来研究热流对自旋阀开关的影响。开关场和电压响应的幅度被发现是依赖于热电流。这些影响是一个热自旋转移扭矩作用于磁化的证据，并占了热，电荷和自旋电流的热力学模型中的Onsager互易关系。
Large heat currents are obtained in Co/Cu/Co spin valves positioned at the middle of Cu nanowires. The second harmonic voltage response to an applied current is used to investigate the effect of the heat current on the switching of the spin valves. Both the switching field and the magnitude of the voltage response are found to be dependent on the heat current. These effects are evidence for a thermal spin-transfer torque acting on the magnetization and are accounted for by a thermodynamic model in which heat, charge and spin currents are linked by Onsager reciprocity relations.