Enhancement of temperature change induced by anomalous Ettingshausen effect in thin Ni films on suspended membrane substrates
Enhancement of temperature change induced by anomalous Ettingshausen effect in thin Ni films on suspended membrane substrates
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DOI：
10.1063/1.5139976
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发表时间：
2020-01-21
影响因子：
4
通讯作者：
Uchida, Ken-ichi
中科院分区：
文献类型：
--
作者：
Modak, Rajkumar;Uchida, Ken-ichi
我们证明了衬底对铁磁薄膜中异常埃廷斯豪森效应引起的温度变化的影响。实验结果表明，与传统的大块衬底实验相比，悬浮膜衬底可以使Ni薄膜中由反常埃廷斯豪森效应引起的温度调制提高一个数量级以上，从而减少了从薄膜到衬底的热耗散。通过一个简单的悬置热电堆结构，温度调制可以进一步增强，该结构由两个Ni带组成，间隔很小。这些演示将为基于薄膜的自旋热电子器件的热设计提供指导。
We demonstrate the effect of substrates on the temperature change induced by the anomalous Ettingshausen effect in ferromagnetic thin films. The experimental results show that, in comparison with conventional experiments using bulk substrates, the temperature modulation due to the anomalous Ettingshausen effect in Ni films can be enhanced by more than an order of magnitude using suspended membrane substrates, which reduce thermal dissipation from the films to the substrates. The temperature modulation can be further enhanced with the help of a simple suspended thermopile configuration consisting of two Ni strips separated by a small distance. These demonstrations will provide a guideline for the thermal design of thin-film-based spin-caloritronic devices.