  We analyze the change in the resistance of a junction between a diffusive
ferromagnetic (F) wire and normal metal electrode, due to the onset of
superconductivity (S) in the latter and a double Andreev scattering process
leading to a complete internal reflection of a large fraction of the
spin-polarized electrons back into the ferromagnet. The superconducting
transition results in an additional contact resistance arising from the
necessity to match spin-polarized current in F-wire to spin-less current in
S-reservoir, which is comparable to the resistance of a piece of a F-wire with
the length equal to the spin-relaxation length.
