Effect of grain-boundary electron scattering in magnetic layers on the magnetoresistive ratio of a polycrystalline sandwich under transverse charge transfer

For a polycrystalline magnetic sandwich, an analytical expression that relates the electron scattering by grain boundary roughness, the conductivity of ferromagnetic layers, and the grain size is derived for the case of a transverse charge transfer. The effect of this scattering mechanism on the giant magnetoresistance of the sandwich is studied with account taken for the dispersity of the ferromagnetic layers and the length of grain-boundary diffusion of nonmagnetic spacer atoms into the layers.