Spin-orbit torques induced by spin Hall and spin swapping currents of a separate ferromagnet in a magnetic trilayer

Eun Sang Park, Byoung Chul Min, Hyun Cheol Koo, Kyoung Whan Kim, Kyung Jin Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Spin-orbit torques (SOTs) have been investigated most widely in normal metal/ferromagnet bilayers where the spin Hall effect of normal metal is a main source of spin currents. Recently, ferromagnets are found to also serve as spin-current sources through spin-orbit coupling. In this work, we theoretically investigate SOT acting on ferromagnet2 in ferromagnet1/normal metal/ferromagnet2 trilayers, which is caused by the spin Hall and spin swapping effects of ferromagnet1. Our result provides an analytical expression of SOT in the trilayers, which may be useful for quantifying the spin Hall and spin swapping effects of ferromagnets and also for designing and interpreting SOT experiments where a ferromagnet is used as a spin-current source instead of a normal metal.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalCurrent Applied Physics
Volume29
DOIs
Publication statusPublished - 2021 Sep
Externally publishedYes

Keywords

  • Spin Hall effect
  • Spin swapping effect
  • Spin-orbit torque

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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