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arXiv 1804.03751cond-mat.mtrl-sci
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自旋波反常能斯特效应将热转化为电荷流

Conversion of Heat into Charge Current by the Spin Wave Anomalous Nernst Effect

M. Mizuguchi, K. Hasegawa, J. Ohe, M. Tsujikawa, M. Shirai, K. Takanashi

摘要:

本文提出了一种新的自旋从温度梯度到横向电压的转变过程,即铁磁金属中的反常能斯特效应。我们报道了在FePt晶态薄膜中,在常规的反常能斯特电压上叠加一个附加电压。局部磁化的动力学由热流调制并激发自旋波。这些通过s-d耦合产生传导电子自旋电流,其沿着温度梯度流动,并且自旋电流通过逆自旋霍尔效应转换为能斯特电压。

英文摘要:

A novel process of spin conversion from a temperature gradient to a transverse voltage is addressed in this paper, viz. the anomalous Nernst effect (ANE) in a ferromagnetic metal. We report that an additional voltage is superposed on the conventional anomalous Nernst voltage in FePt crystalline thin films. The dynamics of the local magnetization is modulated by the heat current and excites spin waves. These generate a conduction electron spin current via s-d coupling, which flows along the temperature gradient, and the spin current is converted to a Nernst voltage by the inverse spin Hall effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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