A novel boundary approach for spin polarized transport in pseudo-spin-valve structure
The interfacial effect on spin polarization is studied in a pseudo-spin-valve structure (PSVs) consisting of two ferromagnetic layers (FM) separated by a nonmagnetic metallic layer (NM). We adopt the macroscopic two-current drift-diffusion model and boundary conditions taking spin flip at FM/NM interfaces into account. The two FM/NM interfaces with respect to the spacer NM layer are combined into a single interface under some appropriate assumptions and new formulae for spin transport boundary conditions are derived. The analytical solutions of spin polarization for both side interfaces of the free layer are calculated from those boundary conditions.