Angular dependence of spin transfer torque on magnetic tunnel junctions with synthetic ferrimagnetic free layer

M. Ichimura, T. Hamada, H. Imamura, S. Takahashi, S. Maekawa

Research output: Contribution to journalConference article

Abstract

Based on a spin-polarized free-electron model, spin and charge transports are analyzed in magnetic tunnel junctions with synthetic ferrimagnetic layers in the ballistic regime, and the spin transfer torque is derived. We characterize the synthetic ferrimagnetic free layer by extending an arbitrary direction of magnetizations of the two free layers forming the synthetic ferrimagnetic free layer. The synthetic ferrimagnetic configuration exerts the approximately optimum torque for small magnetization angle of the first layer relative to that of the pinned layer. For approximately anti-parallel magnetization of the first layer to that of the pinned layer, the parallel magnetization of two magnetic layers is favorable for magnetization reversal rather than the synthetic ferrimagnetic configuration.

Original languageEnglish
Article number062008
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 6
DOIs
Publication statusPublished - 2010 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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