Magnetization dynamics driven by angle-dependent spin-orbit spin-transfer torque

Seo Won Lee, Kyoung Jin Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Spin-orbit torque allows efficient control of the magnetization by using the in-plane current. Recent experiments found a strong angular dependence of spin-orbit torque. We theoretically investigate magnetization switching and domain wall motion induced by an angle-dependent spinorbit torque in perpendicularly magnetized layers. We obtain analytic expressions for the switching current and the domain wall velocity, which are in agreement with numerical results. Based on the expressions, we find that a spin-orbit torque that increases with increasing polar angle of the magnetization is beneficial for both switching and domain wall motion. Our result will serve as a guideline to design and interpret switching and domain wall experiments based on the spin-orbit torque.

Original languageEnglish
Pages (from-to)1848-1852
Number of pages5
JournalJournal of the Korean Physical Society
Volume67
Issue number10
DOIs
Publication statusPublished - 2015 Nov 1

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torque
domain wall
orbits
magnetization

Keywords

  • Domain wall motion
  • Magnetization switching
  • Spin-orbit torque

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Magnetization dynamics driven by angle-dependent spin-orbit spin-transfer torque. / Lee, Seo Won; Lee, Kyoung Jin.

In: Journal of the Korean Physical Society, Vol. 67, No. 10, 01.11.2015, p. 1848-1852.

Research output: Contribution to journalArticle

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AB - Spin-orbit torque allows efficient control of the magnetization by using the in-plane current. Recent experiments found a strong angular dependence of spin-orbit torque. We theoretically investigate magnetization switching and domain wall motion induced by an angle-dependent spinorbit torque in perpendicularly magnetized layers. We obtain analytic expressions for the switching current and the domain wall velocity, which are in agreement with numerical results. Based on the expressions, we find that a spin-orbit torque that increases with increasing polar angle of the magnetization is beneficial for both switching and domain wall motion. Our result will serve as a guideline to design and interpret switching and domain wall experiments based on the spin-orbit torque.

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