Simulation of Switching Properties of Ferroelectrics on the Basis of Dipole Lattice Model

A discrete lattice model developed by Ishibashi is used to explain the field, temperature and grain size dependence of the switching responses of ferroelectrics. Partial switching processes have been simulated using both pulse frequency modulation (PFM) and pulse width modulation (PWM). A new interpretation of the differences between the switching and non-switching responses of the ferroelectric has been obtained on the basis of analyzing the temporal dependence of dipoles' orientation, as described by the proposed model.