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

Eun Sang Park; Dong Kyu Lee; Byoung Chul Min; Kyung Jin Lee

doi:10.1103/PhysRevB.100.214438

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

Eun Sang Park, Dong Kyu Lee, Byoung Chul Min, Kyung Jin Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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.

Original language	English
Article number	214438
Journal	Physical Review B
Volume	100
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.100.214438
Publication status	Published - 2019 Dec 30

Bibliographical note

Funding Information:
This work was supported by the KIST Institutional Program (Project No. 2V05750) and the National Research Foundation of Korea (NRF) (Grants No. 2015M3D1A1070465 and No. 2017R1A2B2006119). APPENDIX A:

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.100.214438

Cite this

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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.",

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

Abstract

Bibliographical note

ASJC Scopus subject areas

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