Thermal Generation of Spin Current in an Antiferromagnet

Physical Review Letters
S SekiY Tokura

Abstract

The longitudinal spin Seebeck effect has been investigated for a uniaxial antiferromagnetic insulator Cr_{2}O_{3}, characterized by a spin-flop transition under magnetic field along the c axis. We have found that a temperature gradient applied normal to the Cr_{2}O_{3}/Pt interface induces inverse spin Hall voltage of spin-current origin in Pt, whose magnitude turns out to be always proportional to magnetization in Cr_{2}O_{3}. The possible contribution of the anomalous Nernst effect is confirmed to be negligibly small. The above results establish that an antiferromagnetic spin wave can be an effective carrier of spin current.

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Citations

Jan 18, 2018·Nanotechnology·Cheng SongFeng Pan
Mar 5, 2016·Nature Nanotechnology·T JungwirthJ Wunderlich
Nov 26, 2016·Physical Review Letters·Takashi KikkawaEiji Saitoh
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Dec 24, 2019·Physical Review Letters·Yang ChengFengyuan Yang
Dec 24, 2016·Physical Review Letters·Yi-Jia Chen, Ssu-Yen Huang
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Jun 3, 2020·Nature Nanotechnology·Jiahao HanLuqiao Liu
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Feb 13, 2021·Nano Letters·Sandip AryalRanjit Pati
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Sep 30, 2021·Science Advances·Changjiang LiuAnand Bhattacharya

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