Spin Accumulation at Ferromagnet/Non-magnetic Material Interfaces

Details Spin Accumulation at Ferromagnet/Non-magnetic Material Interfaces Spin Accumulation at Ferromagnet/Non-magnetic Material Interfaces

2011-08-25

arxiv.org/abs/1108.4969v2

Physics

Condensed Matter

Other Condensed Matter

11 pages, 4 figures, 2 tables

Scientific paper

Many proposed and realized spintronic devices involve spin injection and accumulation at an interface between a ferromagnet and a non-magnetic material. We examine the electric field, voltage profile, charge distribution, spin fluxes, and spin accumulation at such an interface. We include the effects of both screening and spin scattering. We also include both the spin-dependent chemical potentials {\mu}_{\uparrow,\downarrow} and the effective magnetic field H* that is zero in equilibrium. For a Co/Cu interface, we find that the spin accumulation in the copper is an order of magnitude larger when both chemical potential and effective magnetic field are included. We also show that screening contributes to the spin accumulation in the ferromagnet; this contribution can be significant.

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