Enhancement of low-frequency spin-orbit-torque ferromagnetic resonance signals  by frequency tuning observed in Pt/Py,  Pt/Co, and Pt/Fe bilayers

Motomi Aoki; Ei Shigematsu; Masayuki Matsushima; Ryo Ohshima; Syuta Honda; Teruya Shinjo; Masashi Shiraishi; Yuichiro Ando

doi:10.1063/9.0000066

AIP Advances (Feb 2021)

Enhancement of low-frequency spin-orbit-torque ferromagnetic resonance signals by frequency tuning observed in Pt/Py, Pt/Co, and Pt/Fe bilayers

Motomi Aoki,
Ei Shigematsu,
Masayuki Matsushima,
Ryo Ohshima,
Syuta Honda,
Teruya Shinjo,
Masashi Shiraishi,
Yuichiro Ando

Affiliations

Motomi Aoki: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Ei Shigematsu: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Masayuki Matsushima: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Ryo Ohshima: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Syuta Honda: Department of Pure and Applied Physics, Kansai University, Suita, Osaka 564-8680, Japan
Teruya Shinjo: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Masashi Shiraishi: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan
Yuichiro Ando: Department of Electronic Science and Engineering, Kyoto University, Kyoto, Kyoto 615-8510, Japan

DOI: https://doi.org/10.1063/9.0000066
Journal volume & issue: Vol. 11, no. 2
pp. 025206 – 025206-6

Abstract

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DC voltages via spin rectification effect (SRE), VDC, under microwave irradiation are investigated for three platinum (Pt)/ferromagnetic metal (FM) bilayer structures: Pt/Ni80Fe20, Pt/Co, and Pt/Fe. At the microwave frequency region lower than the resonant frequency, large VDC is obtained at zero DC magnetic field for all devices. In frequency dependence just around the resonant frequency, sharp rise and drop of magnitude in VDC are observed. These behaviors are well explained by the numerically calculated magnetic susceptibility. It is also found that the magnitude of VDC is strongly dependent on the slope of magnetoresistance spectrum. These findings lead to developments of sensitive detection technique for nano-scale magnetization switching.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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