Artifact-free optical spin-orbit torque magnetometry

Title
Artifact-free optical spin-orbit torque magnetometry
Authors
민병철박용근김주성황현석박정현최석봉
Issue Date
2019-05
Publisher
Applied physics letters
Citation
VOL 114-182402-5
Abstract
Here, we demonstrate an optical spin– orbit torque (SOT) measurement scheme that is free from artifacts such as the optic planar Hall effect (PHE) and the optic anomalous Nernst effect (ANE). Such PHE and ANE signals complicate the SOT analysis in the electrical harmonic measurement method. Our optical setup utilizes photoelastic modulation and balanced detection to measure the polar magneto-optic Kerr effect (pMOKE) signal exclusively. We verified the separation of the pMOKE signal in the Pt/Py bilayer sample with a sizable optic PHE. Our method uses a single measurement principle and reduces the analysis complexity, and thus could help expand the scope of SOT studies.
URI
http://pubs.kist.re.kr/handle/201004/69498
ISSN
0003-6951
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KIST Publication > Article
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