We study an (l, n) finite superlattice, which consists of two alternative m
agnetic materials(components) of I and n atomic layers, respectively. Based
on the Ising model, we examine the phase transition properties of the magn
etic superlattice. By transfer matrix method we derive the equation for Cur
ie temperature of the superlattice. Numerical results are obtained for the
dependence of Curie temperature on the thickness and exchange constants of
the superlattice.