Description of current-driven torques in magnetic tunnel junctions

A. Manchon*, N. Ryzhanova, A. Vedyayev, M. Chschiev, B. Dieny

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

A free electron description of spin-dependent transport in magnetic tunnel junctions with non-collinear magnetizations is presented. We investigate the origin of transverse spin density in tunneling transport and the quantum interferences which give rise to oscillatory torques on the local magnetization. Spin transfer torque is also analyzed and an important bias asymmetry is found as well as a damped oscillatory behavior. Furthermore, we investigate the influence of the s-d exchange coupling on torque, in particular in the case of half-metallic MTJs, in which the spin transfer torque is due to interfacial spin-dependent reflections.

Original languageEnglish (US)
Article number145208
JournalJournal of Physics Condensed Matter
Volume20
Issue number14
DOIs
StatePublished - Apr 9 2008

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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