Mechanisms of Spin-Dependent Heat Generation in Spin Valves

doi:10.1088/0256-307X/34/6/067202

Chin. Phys. Lett.

2017, Vol. 34

Issue (6): 067202 DOI: 10.1088/0256-307X/34/6/067202

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Mechanisms of Spin-Dependent Heat Generation in Spin Valves

Xiao-Xue Zhang, Yao-Hui Zhu^**, Pei-Song He, Bao-He Li

Department of Physics, Beijing Technology and Business University, Beijing 100048

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Xiao-Xue Zhang, Yao-Hui Zhu, Pei-Song He et al 2017 Chin. Phys. Lett. 34 067202

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Abstract The extra heat generation in spin transport is usually interpreted in terms of the spin relaxation. Reformulating the heat generation rate, we find alternative current-force pairs without cross effects, which enable us to interpret the product of each pair as a distinct mechanism of heat generation. The results show that the spin-dependent part of the heat generation includes two terms. One is proportional to the square of the spin accumulation and arises from the spin relaxation. However, the other is proportional to the square of the spin-accumulation gradient and should be attributed to another mechanism, the spin diffusion. We illustrate the characteristics of the two mechanisms in a typical spin valve with a finite nonmagnetic spacer layer.

Received: 04 February 2017 Published: 23 May 2017

PACS:	72.25.-b	(Spin polarized transport)
	72.25.Rb	(Spin relaxation and scattering)
	75.40.Gb	(Dynamic properties?)

Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11404013, 11605003, 61405003, 11174020 and 11474012, the Scientific Research Project of Beijing Educational Committee under Grant No KM201510011002, and the 2016 Graduate Research Program of Beijing Technology and Business University.

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https://cpl.iphy.ac.cn/10.1088/0256-307X/34/6/067202 OR https://cpl.iphy.ac.cn/Y2017/V34/I6/067202

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	Xiao-Xue Zhang
	Yao-Hui Zhu
	Pei-Song He
	Bao-He Li

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