Phase transitions of ferromagnetic Ising films with amorphous surfaces

The critical behavior of a ferromagnetic Ising film with amorphous surfaces is studied within the framework of the effective field theory. The method takes into consideration the fluctuation of the effective held and is based on a probability distribution of random variables which correctly accounts for all the single site kinematic relations. The dependence of the critica l temperature on exchange interaction strength ratio, film thickness, and a morphization is presented. Tt is found that an order-disorder magnetic tran sition occurs by varying the thickness of the film, Such a result is in agr eement with experiments performed recently on Fe-films.