Curie temperature for a finite alternating magnetic superlattice

Abstract

The authors study a spin-one-half Ising model of an alternating magnetic superlattice. They use the mean-field approximation and express their results for the Curie temperature in terms of two types of determinants. The dependence of the Curie temperature on the film thickness is obtained. The effects of surface modification on finite superlattices are studied numerically for two types of modification to the surface exchange constants.