Spin-diffusion effect in the ferromagnet–metal bilayer

Abstract Spin accumulation in a ferromagnet–metal bilayer is investigated by means of the Boltzmann transport equation. We consider the spin-dependent diffusive scatterings from different mean free paths between the ferromagnet and the metal, and find that the resultant spin-diffusion length depends both on the interfacial properties and on the mean free paths, and that it usually is less than the metal mean free path.