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Thermodynamics Study on the Decay Properties of Reversed Domains in LiNbO₃ Single Crystals

Li LB, Li GL, Kan Y, Lu XM and Zhu JS

The decay properties of reversed domains fabricated by scanning probe microscopy fixed-point poling in LiNbO3 single crystals are simulated by a modified dynamic Ginzburg–Landau equation based on a simple model. The depolarization field is equivalently acted by the coercive field of ferroelectrics. The penetrated domain with a small coercive field is stable and has a long lifetime. The non-penetrated domain with maximum coercive field may ultimately experience a metastable state and disappears. Our theoretical results well agree with known experiments. We predict that the non-penetrated domain lifetime decreases with increased temperature.