Electric and thermo spin transfer torques in Fe/Vacuum/Fe tunnel junction

doi:10.1007/s11467-013-0375-z

Front. Phys.

2014, Vol. 9

Issue (6) : 768-773 https://doi.org/10.1007/s11467-013-0375-z

RESEARCH ARTICLE

Electric and thermo spin transfer torques in Fe/Vacuum/Fe tunnel junction

Xing-Tao Jia^1,²,Ke Xia^1,^*(

)

1. Department of Physics, Beijing Normal University, Beijing 100875, China
2. Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China

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Abstract

We present first-principle calculations of electric and thermo spin transfer torques (STT) in Fe/Vacuum(Vac)/Fe magnetic tunnel junctions (MTJs). Our quantitative studies demonstrate rich bias dependence of STT and tunnel magneto resistance (TMR) behaviors with respect to the interface roughness. Thermoelectric effects in Fe/Vac/Fe MTJs is remarkable. We observe larger ZT of 6.2 in 8 ML clean Vacuum barrier, where the heavily restrained thermal conductance should be responsible for. Thermo-STT in Fe/Vac/Fe MTJs show same order as that in Fe/MgO/Fe MTJs with similar barrier thickness.

Keywords thermoelectric effect spin transfer torque Fe/Vacuum/Fe tunnel junction

Corresponding Author(s): Ke Xia

Issue Date: 24 December 2014

Cite this article:

Xing-Tao Jia,Ke Xia. Electric and thermo spin transfer torques in Fe/Vacuum/Fe tunnel junction[J]. Front. Phys. , 2014, 9(6): 768-773.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-013-0375-z
https://academic.hep.com.cn/fop/EN/Y2014/V9/I6/768

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