Magnetic properties in ferroelectric superlattices with two alternative layers described by a transverse spin-1/2 Ising model

The critical. temperature, magnetization, and subceptibility in ferroelectric superlattices with two alternative layers described by a transverse spin-1/2 Ising model are studied using the effective field theory with a probability distribution technique. We discuss an L-t layer superlattice of simple cubic symmetry with nearest-neighbor interactions. We derive the phase diagram, the magnetizations profiles, and the susceptibilities. In such superlattices, the critical temperature can shift to either a lower or higher temperature compared with the corresponding bulk value. The superlattice longitudinal susceptibility diverges at the superlattice critical temperature