Spin Torque and its Relation to Spin Filtering

Details Spin Torque and its Relation to Spin Filtering Spin Torque and its Relation to Spin Filtering

2003-10-16

arxiv.org/abs/cond-mat/0310392v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 figures

Scientific paper

10.1103/PhysRevB.69.212406

The spin torque exerted on a magnetic moment is a reaction to spin filtering when spin-polarized electrons interact with a thin ferromagnetic film. We show that, for certain conditions, a spin transmission resonance (STR) gives rise to a failure of spin filtering. As a consequence, no spin is transfered to the ferromagnet. The condition for STR depends on the incoming energy of electrons and the thickness of the film. For a simple model we find that when the STR condition is satisfied, the ferromagnetic film is transparent to the incoming electrons.

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