  The Andreev reflection of narrow ferromagnet/superconductor point contacts is
theoretically studied. We show that the conductance quantization depends on
whether the contact region is superconducting or ferromagnetic as well as on
the strength of the exchange field in the ferromagnet. The Andreev reflection
of the ferromagnetic contact is more suppressed than that of the
superconducting contact. We also show that the conductance-voltage curve has a
bump at zero bias-voltage if there is no interfacial-scattering. On the
contrary, the conductance-voltage curve shows a dip if the system has an
interfacial-scattering.
