Elimination of thermoelectric artifacts in the harmonic Hall measurement of spin-orbit torque

Title
Elimination of thermoelectric artifacts in the harmonic Hall measurement of spin-orbit torque
Authors
민병철박은상이동규이경진
Issue Date
2019-12
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 100, NO 21-214438-11
Abstract
The harmonic Hall measurement is widely used to determine the equivalent field of current-induced spin-orbit torque in ferromagnet/normal metal bilayers. We report that this method suffers from various thermoelectric artifacts that have not been considered. We propose and experimentally demonstrate how to eliminate major thermoelectric artifacts using, namely, the four-direction (4-D) methods interchanging current and field polarities, which allow us to determine the magnitudes and angular dependences of spin-orbit torques more accurately than a conventional method. The proposed 4-D method will be useful for searching suitable materials for device applications operated by spin-orbit torques.
URI
http://pubs.kist.re.kr/handle/201004/70877
ISSN
2469-9950
Appears in Collections:
KIST Publication > Article
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