  In this paper, the Curie temperature of ferroelectric films is studied using
spin-1/2 transverse Ising model with long-range interaction within the
framework of the effective-field theory. The dependence of the Curie
temperature on the thickness of the film, the surface interaction and the
transverse field were investigated. It is assumed that the long-range
interaction decays with the distance between the pseudo-spins as a power law.
The dependence of the Curie temperature and the critical transverse field on
the long-range exponent are obtained.
