  Thickness (dF) and concentration (x) dependence of the Curie temperature of
NixCu100-x(dF) ferromagnetic alloy layers (x =0.55,0.65, dF =[3nm{\div}12nm])
being in contact with a vanadium layer was studied. The Curie temperature of
the ferromagnetic layers depends on the thickness when it is comparable with
the interface layer between the F and the vanadium layers, which is attributed
to the proximity coupling of the interface region with the rest of the F layer.
The present study provides valuable information for fabrication of samples with
controlled exchange coupling strength for studies of superconductor/ferromagnet
(S/F) proximity effects.
