The magnetic properties of disordered Fe–Al alloy system

Using the effective field theory with a probability distribution technique that accounts for the self-spin correlation functions, the magnetic properties of disordered Fe–Al alloys on the basis of a site-diluted quantum Heisenberg spin model are examined. We calculated the critical temperature and the hysteresis loops for this system. We find a number of characteristic phenomena. In particular, the effect of concentration cc of magnetic atoms and the reduced exchange anisotropic parameter ηη on both the critical temperature and magnetization profiles are clarified.