A model binary alloy A(x) B-1-x, where A and B represent ferromagnetic
and paramagnetic transition metal respectively is considered within t
he framework of periodic Anderson model, and the effects of d-level di
sorder and variation of electron concentration due to alloying on the
magnetic properties are investigated. The phase boundary, thermal beha
vior of magnetization and susceptibility of the alloy are obtained usi
ng HF approximation for the Coulomb interaction and the virtual crysta
l approximation for d-level disorder. The ferromagnetic state of alloy
vanishes at a critical concentration x(c) which depends on d-band wid
th, strength of s-d hybridization and the Coulomb interaction. The re-
entrant magnetic phase is found within a small region of x for alloy w
ith narrow d-band. For x less than or similar to x(c), the magnetic pr
operties resemble that of spin-glass system. For x << x(c), the alloy
behaves like a Pauli paramagnet. The re-entrant and spin-glass-like ph
ases are associated with the increase in d-level population as tempera
ture decreases. Local moment for x similar or equal to 1 decreases wit
h temperature up to T-c whereas the reverse is the situation for alloy
exhibiting spin-glass-like behavior.