Simulations of Polarization Reversals by a Two-Dimensional Lattice Model

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Abstract
Simulations of step-type and pulse responses have been performed using a two-dimensional lattice model in ferroelectrics in which latent nuclei are randomly distributed. Polarization and current responses under the step-type applied field and the narrow applied pulse field shorter than switching time t sw are described. The critical pulse width t *, for which the system returns to the initial polarization state after the narrow applied pulse field is removed, is obtained, and it is found that the value of t * depends on the applied field and the interaction between neighboring dipole moments.

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