Manipulation of Spin-Torque Generation Using Ultrathin Au

Hongyu An, Satoshi Haku, Yusuke Kanno, Hiroyasu Nakayama, Hideyuki Maki, Ji Shi, Kazuya Ando

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The generation and the manipulation of current-induced spin-orbit torques are of essential interest in spintronics. However, in spite of the vital progress in spin orbitronics, electric control of the spin-torque generation still remains elusive and challenging. We report on electric control of the spin-torque generation using ionic-liquid gating of ultrathin Au. We show that by simply depositing a SiO2 capping layer on an ultrathin-Au/Ni81Fe19 bilayer, the spin-torque generation efficiency is drastically enhanced by a maximum of 7 times. This enhancement is verified to be originated from the rough ultrathin-Au/Ni81Fe19 interface induced by the SiO2 deposition, which results in the enhancement of the interface spin-orbit scattering. We further show that the spin-torque generation efficiency from the ultrathin Au film can be reversibly manipulated by a factor of 2 using the ionic gating with an external electric field within a small range of 1 V. These results pave a way towards the efficient control of the spin-torque generation in spintronic applications.

Original languageEnglish
Article number064016
JournalPhysical Review Applied
Volume9
Issue number6
DOIs
Publication statusPublished - 2018 Jun 12

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torque
manipulators
electric control
orbits
augmentation
electric fields
liquids
scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Manipulation of Spin-Torque Generation Using Ultrathin Au. / An, Hongyu; Haku, Satoshi; Kanno, Yusuke; Nakayama, Hiroyasu; Maki, Hideyuki; Shi, Ji; Ando, Kazuya.

In: Physical Review Applied, Vol. 9, No. 6, 064016, 12.06.2018.

Research output: Contribution to journalArticle

An, Hongyu ; Haku, Satoshi ; Kanno, Yusuke ; Nakayama, Hiroyasu ; Maki, Hideyuki ; Shi, Ji ; Ando, Kazuya. / Manipulation of Spin-Torque Generation Using Ultrathin Au. In: Physical Review Applied. 2018 ; Vol. 9, No. 6.
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