The phase diagram and paramagnetic susceptibility of the spin 32 Blume-Capel model are investigated within the statistical accuracy of the Bethe-Peierls approximation (or the correlated effective field treatment). In particular, the inverse paramagnetic susceptibility may show an outstanding...

The phase diagrams of a disordered interface consisting of two mixed layers between two semi-infinite spin-12 Ising ferromagnets (A and B) in a transverse field are investigated by the use of the effective-field theory. We have obtained some interesting results. (i) For zero transverse field,...