Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires
Thermal Spin-Valve Effect in Magnetic Multi-layered Nanowires
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磁性多层纳米线中的热自旋阀效应
DOI：
10.1007/s10948-019-5016-5
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发表时间：
2019
影响因子：
1.8
通讯作者：
K. Ohnishi and T. Kimura
中科院分区：
文献类型：
--
作者：
N. Asam;K. Yamanoi;K. Ohnishi and T. Kimura
研究了自旋相关散射对NiFe/Cu/NiFe和Co/Cu/Co三层纳米线热输运的影响。利用集成的纳米热电偶对三层金属丝的热导率及其自旋依赖性进行了研究。我们发现热自旋阀效应总是比电自旋阀效应大8倍左右，即巨磁电阻效应。数值模拟与实验结果，使我们能够估计的三层线的热导率及其自旋依赖性。令人惊讶的是，对于Co/Cu/Co线的热导率的自旋依赖性高达8%，这比电的大得多。这表明热自旋阀效应具有很高的应用潜力。
We have investigated the influence of the spin-dependent scattering on the heat transports in NiFe/Cu/NiFe and Co/Cu/Co tri-layered nanowires. The thermal conductivity and its spin dependence for the tri-layered wires have been evaluated by using an integrated nano-sized thermo couple. We find that the thermal spin-valve effect is always approximately 8 times larger than the electrical spin-valve effect, namely giant magnetoresistance effect. The numerical simulation with the experimental results enable us to estimate the thermal conductivity for the tri-layered wire and its spin dependence. Surprisingly, the spin dependence of the thermal conductivity for the Co/Cu/Co wire is as high as 8%, which is much larger than the electrical one. This indicates a high potential application of the thermal spin-valve effect.
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