Monte Carlo study of the polarization and depolarization properties of order-disorder ferroelectrics

The spontaneous polarization and depolarization in order-disorder ferroelectrics are studied using a Monte Carlo computer simulation method. Our study has been developed in a framework of the transverse field Ising model with the nearest-neighbor interaction. Two effects of tunneling frequency and external electrical field on the polarization and depolarization are taken into consideration. From our simulation results, the polarization of order-disorder ferroelectrics decreases significantly with the increase in tunneling frequency. The remnant polarization and the saturation coercive force of these ferroelectrics are also calculated, and a good agreement with previous theoretical and experimental results is obtained. (C) 2001 Elsevier Science B.V. All rights reserved.