Thermal Generation of Spin Current in an Antiferromagnet

被引：226

作者：

Seki, S. ^{[1
,2
]}

Ideue, T. ^{[3
,4
]}

Kubota, M. ^{[1
,5
]}

Kozuka, Y. ^{[3
,4
]}

Takagi, R. ^{[1
]}

Nakamura, M. ^{[1
]}

Kaneko, Y. ^{[1
]}

Kawasaki, M. ^{[1
,4
]}

Tokura, Y. ^{[1
,4
]}

机构：

[1] RIKEN, CEMS, Wako, Saitama 3510198, Japan

[2] Japan Sci & Technol Agcy JST, PRESTO, Tokyo 1028666, Japan

[3] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[4] Univ Tokyo, QPEC, Tokyo 1138656, Japan

[5] ROHM Co Ltd, Res & Dev Headquarters, Kyoto 6158585, Japan

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 26期

基金：

日本学术振兴会;

关键词：

ROOM-TEMPERATURE; INSULATOR; CR2O3; CALORITRONICS; TRANSITIONS; RESONANCE; PHASE;

D O I：

10.1103/PhysRevLett.115.266601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The longitudinal spin Seebeck effect has been investigated for a uniaxial antiferromagnetic insulator Cr2O3, characterized by a spin-flop transition under magnetic field along the c axis. We have found that a temperature gradient applied normal to the Cr2O3/Pt interface induces inverse spin Hall voltage of spincurrent origin in Pt, whose magnitude turns out to be always proportional to magnetization in Cr2O3. 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.

引用

页数：5

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