  Measurements of the perpendicular upper critical magnetic field H_{c2
\perp}(T) are reported for several Nb/CuMn multilayers. It is found that,
despite the magnetic nature of the samples, the data for samples with low Mn
percentage in the CuMn layers are simply described by the
Werthamer-Helfand-Honenberg theory for conventional type-II superconductors,
neglecting both Pauli spin paramagnetism and spin orbit impurity scattering.
For high Mn concentration a different theoretical aprroach is needed.

Superconductivity