Nonlocal orbital torques in magnetic multilayers

Mari Taniguchi, Hiroki Hayashi, Nozomi Soya, Kazuya Ando

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We investigate current-induced torques in Ni/Ti/Fe/Ti multilayers. In the multilayers, we find that the damping-like torque acting on the Ni magnetization increases with the thickness of the bottom Ti layer, despite the negligible spin Hall conductivity of Ti and the presence of the Fe interlayer that effectively absorbs the transverse spins. The nonlocal nature of the observed torque is consistent with the orbital torque arising from the orbital Hall effect in the Ti layer and orbital transport through the Fe layer. This observation highlights the unique features of the orbital currents, offering enhanced flexibility in the design of spintronic devices.

Original languageEnglish
Article number043001
JournalApplied Physics Express
Volume16
Issue number4
DOIs
Publication statusPublished - 2023 Apr

Keywords

  • spin current
  • spin orbit torque
  • spin torque ferromagnetic resonance
  • spintronics

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy

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