Spin transfer torque with spin diffusion in magnetic tunnel junctions

Aurelien Manchon, R. Matsumoto, H. Jaffres, J. Grollier

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Spin transport in magnetic tunnel junctions in the presence of spin diffusion is considered theoretically. Combining ballistic tunneling across the barrier and diffusive transport in the electrodes, we solve the spin dynamics equation in the metallic layers. We show that spin diffusion mixes the transverse spin current components and dramatically modifies the bias dependence of the effective spin transfer torque. This leads to a significant linear bias dependence of the out-of-plane torque, as well as a nonconventional thickness dependence of both spin torque components.
Original languageEnglish (US)
JournalPhysical Review B
Volume86
Issue number6
DOIs
StatePublished - Aug 9 2012

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