  The transmission of correlated electrons through a domain wall in
ferromagnetic quasi-one-dimensional systems is studied theoretically in the
case when the domain wall width is comparable with the Fermi wavelength of the
charge carriers. The wall gives rise to both potential and spin dependent
scattering. Using a poor man's renormalization group approach, we obtain
scaling equations for the scattering amplitudes. For repulsive interactions,
the wall is shown to reflect all incident electrons at the zero temperature
fixed points. In one of the fixed points the wall additionally flips the spin
of all incident electrons, generating a finite spin current without associated
charge current.
