Dynamic Simulation of Polarization Reversal Processes in Ferroelectric Crystals under Electron Beam Irradiation

Abstract

The paper describes the results of dynamic simulation of electron beam-induced polarization reversal process in ferroelectrics with a focus on a fractal approach. The methods of fractal analysis were used to estimate the scaling characteristics of TGS-domain structure images and polarization switching current obtained with the SEM. The computer simulation results of domain configuration geometry and corresponding form of switching current are presented. Using modified Kolmogorov-Avrami model, the polarization current was determined taking into account differential equation with fractional derivative. The main features of simulation curve of polarization switching current correspond to experimental data observed.

Keywords:

• Scanning electron microscope
• electron beam
• ferroelectrics
• domain structure
• polarization reversal
• polarization current
• differential equation with fractional derivative
• simulation