Voltage control of spin-orbit torque in Pd/Co/Pd/HfOx

Voltage control of current-induced spin-orbit torque (SOT) in an in-plane-magnetized Pd/Co/Pd system with a low-temperature-deposited HfOx and a gate electrode on top is studied. An application of the gate electric field to the HfOx layer is to induce a non-volatile electrochemical effect from the P...

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Bibliographic Details
Published inApplied physics express Vol. 13; no. 12
Main Authors Hirai, Takamasa, Hibino, Yuki, Hasegawa, Kento, Kohda, Makoto, Koyama, Tomohiro, Chiba, Daichi
Format Journal Article
LanguageEnglish
Japanese
Published IOP Publishing 01.12.2020
Subjects
magneto-ionic
spin-orbit torque
voltage control
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Summary:Voltage control of current-induced spin-orbit torque (SOT) in an in-plane-magnetized Pd/Co/Pd system with a low-temperature-deposited HfOx and a gate electrode on top is studied. An application of the gate electric field to the HfOx layer is to induce a non-volatile electrochemical effect from the Pd/HfOx interface. By means of low-frequency harmonic Hall measurements, the voltage modulation of both damping-like and field-like SOT is obtained. The sign of the voltage-induced SOT modification is found to be reversed by changing the top Pd thickness. Our finding is expected to facilitate the efficient active manipulation of SOT.
Bibliography:APEX-104470.R1
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/abcd71