Quantum Mechanics of Spin Transfer in Ferromagnetic Multilayers

Details Quantum Mechanics of Spin Transfer in Ferromagnetic Multilayers Quantum Mechanics of Spin Transfer in Ferromagnetic Multilayers

2004-07-14

arxiv.org/abs/cond-mat/0407365v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 figures

Scientific paper

We use a quantum mechanical treatment of a ballistic spin current to describe novel aspects of spin transfer to a ferromagnetic multilayer. We demonstrate quantum phenomena from spin transmission resonance (STR) to magnetoelectric spin echo (MESE), depending on the coupling between the magnetic moments in the ferromagnetic thin films. Our calculation reveals new channels through which the zero spin transfer occurs in multilayers: the STR and MESE. We also illustrate that counter-intuitively, a negative spin torque can act initially on the second moment in a bilayer system.

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