Ballistic and diffuse transport through a ferromagnetic domain wall

We study transport through ballistic and diffuse ferromagnetic domain walls in a two-band Stoner model with a rotating magnetization direction. For a ballistic domain wall, the change in the conductance due to the domain wall scattering is obtained from an adiabatic approximation valid when the leng th of tho domain wall is much longer than the Fermi wavelength. In diffuse systems, the change in the resistivity is calculated using a diagrammatic t echnique to the lowest order in the domain-wall scattering and taking into account spin dependent scattering lifetimes and screening of the domain-wal l potential. [S0163-1829(99)09829-X].