Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect

Soo Man Seo, Kyoung Whan Kim, Jisu Ryu, Hyun Woo Lee, Kyoung Jin Lee

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

We theoretically study current-induced dynamics of a transverse magnetic domain wall in bi-layer nanowires consisting of a ferromagnetic layer on top of a nonmagnetic layer with strong spin-orbit coupling. Domain wall dynamics is characterized by two threshold current densities, J th WB and J th REV, where J th WB is a threshold for the chirality switching of the domain wall and J th REV is another threshold for the reversed domain wall motion caused by spin Hall effect. Domain walls with a certain chirality may move opposite to the electron-flow direction with high speed in the current range J th REV J J th WB for the system designed to satisfy the conditions J th WB > J th REV and α > β, where α is the Gilbert damping constant and β is the nonadiabaticity of spin torque. Micromagnetic simulations confirm the validity of analytical results.

Original languageEnglish
Article number022405
JournalApplied Physics Letters
Volume101
Issue number2
DOIs
Publication statusPublished - 2012 Jul 9

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magnetic domains
domain wall
Hall effect
chirality
thresholds
threshold currents
torque
nanowires
damping
high speed
current density
orbits
electrons
simulation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect. / Seo, Soo Man; Kim, Kyoung Whan; Ryu, Jisu; Lee, Hyun Woo; Lee, Kyoung Jin.

In: Applied Physics Letters, Vol. 101, No. 2, 022405, 09.07.2012.

Research output: Contribution to journalArticle

Seo, Soo Man ; Kim, Kyoung Whan ; Ryu, Jisu ; Lee, Hyun Woo ; Lee, Kyoung Jin. / Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect. In: Applied Physics Letters. 2012 ; Vol. 101, No. 2.
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