Abstract
The longitudinal spin Seebeck effect has been investigated for a uniaxial antiferromagnetic insulator , characterized by a spin-flop transition under magnetic field along the axis. We have found that a temperature gradient applied normal to the interface induces inverse spin Hall voltage of spin-current origin in Pt, whose magnitude turns out to be always proportional to magnetization in . 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.
- Received 11 August 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.266601
© 2015 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Spin Currents in Antiferromagnets
Published 29 December 2015
Experiments show that a heat gradient can generate a spin-wave spin current in an antiferromagnetic insulator.
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