All-optical probe of magnetization precession modulated by spin-orbit torque

Kazuaki Ishibashi; Satoshi Iihama; Yutaro Takeuchi; Kaito Furuya; Shun Kanai; Shunsuke Fukami; Shigemi Mizukami

doi:10.1063/5.0020852

All-optical probe of magnetization precession modulated by spin-orbit torque

Kazuaki Ishibashi, Satoshi Iihama, Yutaro Takeuchi, Kaito Furuya, Shun Kanai, Shunsuke Fukami, Shigemi Mizukami

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

5 Citations (Scopus)

Abstract

Laser-induced magnetization precession modulated by an in-plane direct current was investigated in a W/CoFeB/MgO micron-sized strip using an all-optical time-resolved magneto-optical Kerr effect microscope. We observed a relatively large change in the precession frequency, owing to a current-induced spin-orbit torque. The generation efficiency of the spin-orbit torque was evaluated as-0.35 ± 0.03, which was in accordance with that evaluated from the modulation of damping. This technique may become an alternate method for the evaluation of spin-orbit torque.

Original language	English
Article number	122403
Journal	Applied Physics Letters
Volume	117
Issue number	12
DOIs	https://doi.org/10.1063/5.0020852
Publication status	Published - 2020 Sept 21

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/5.0020852

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title = "All-optical probe of magnetization precession modulated by spin-orbit torque",

abstract = "Laser-induced magnetization precession modulated by an in-plane direct current was investigated in a W/CoFeB/MgO micron-sized strip using an all-optical time-resolved magneto-optical Kerr effect microscope. We observed a relatively large change in the precession frequency, owing to a current-induced spin-orbit torque. The generation efficiency of the spin-orbit torque was evaluated as-0.35 ± 0.03, which was in accordance with that evaluated from the modulation of damping. This technique may become an alternate method for the evaluation of spin-orbit torque.",

author = "Kazuaki Ishibashi and Satoshi Iihama and Yutaro Takeuchi and Kaito Furuya and Shun Kanai and Shunsuke Fukami and Shigemi Mizukami",

note = "Funding Information: This study was partially supported by KAKENHI (Nos. 19K15430 and 19H05622), the ImPACT Program of CSTI, Advanced Technology Institute Research Grants, and the Center for Spintronics Research Network (CSRN). Publisher Copyright: {\textcopyright} 2020 Author(s).",

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T1 - All-optical probe of magnetization precession modulated by spin-orbit torque

AU - Ishibashi, Kazuaki

AU - Iihama, Satoshi

AU - Takeuchi, Yutaro

AU - Furuya, Kaito

AU - Kanai, Shun

AU - Fukami, Shunsuke

AU - Mizukami, Shigemi

N1 - Funding Information: This study was partially supported by KAKENHI (Nos. 19K15430 and 19H05622), the ImPACT Program of CSTI, Advanced Technology Institute Research Grants, and the Center for Spintronics Research Network (CSRN). Publisher Copyright: © 2020 Author(s).

PY - 2020/9/21

Y1 - 2020/9/21

N2 - Laser-induced magnetization precession modulated by an in-plane direct current was investigated in a W/CoFeB/MgO micron-sized strip using an all-optical time-resolved magneto-optical Kerr effect microscope. We observed a relatively large change in the precession frequency, owing to a current-induced spin-orbit torque. The generation efficiency of the spin-orbit torque was evaluated as-0.35 ± 0.03, which was in accordance with that evaluated from the modulation of damping. This technique may become an alternate method for the evaluation of spin-orbit torque.

AB - Laser-induced magnetization precession modulated by an in-plane direct current was investigated in a W/CoFeB/MgO micron-sized strip using an all-optical time-resolved magneto-optical Kerr effect microscope. We observed a relatively large change in the precession frequency, owing to a current-induced spin-orbit torque. The generation efficiency of the spin-orbit torque was evaluated as-0.35 ± 0.03, which was in accordance with that evaluated from the modulation of damping. This technique may become an alternate method for the evaluation of spin-orbit torque.

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All-optical probe of magnetization precession modulated by spin-orbit torque

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