Antiferroelectric hysteresis loops with two exchange constants using the two dimensional Ising model

Abstract

Monte-Carlo simulations are carried out to reproduce hysteresis loops of antiferroelectric single crystals using an Ising Hamiltonian in two dimensions where pseudospin interactions are defined by two constants. It is shown that with this approach, hysteresis loops can be obtained in very good qualitative agreement with the experiments. While our approach is similar to that of Milhazes et al. [Phys. Status Solidi B 242, 1141 (2005)], we also demonstrate that the hysteresis loop shapes heavily depend on the ratio of the electrostaticlike term to the intrinsic Hamiltonian of the system.