  Magnetic and electric properties of the Hubbard model with binary alloy
disorder are studied within the dynamical mean--field theory. A
paramagnet--ferromagnet phase transition and a Mott--Hubbard metal--insulator
transition are observed upon varying the alloy concentration. A disorder
induced enhancement of the Curie temperature is demonstrated and explained by
the effects of band splitting and subband filling. Different quantum phase
transitions driven by changes of the alloy concentration are identified.
