Voltage control of spin-orbit torque in Pd/Co/Pd/HfO x

Takamasa Hirai, Yuki Hibino, Kento Hasegawa, Makoto Kohda, Tomohiro Koyama, Daichi Chiba

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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

Original languageEnglish
Article number123005
JournalApplied Physics Express
Issue number12
Publication statusPublished - 2020 Dec 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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