Thermal Generation of Spin Current in an Antiferromagnet

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...

Full description

Saved in:
Bibliographic Details
Published in:Physical review letters 2015-12, Vol.115 (26), p.266601-266601, Article 266601
Main Authors: Seki, S, Ideue, T, Kubota, M, Kozuka, Y, Takagi, R, Nakamura, M, Kaneko, Y, Kawasaki, M, Tokura, Y
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chromium oxides
Current carriers
Electric current
Platinum
Spin waves
Spintronics
Voltage
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.115.266601