Constrained Modeling of Domain Patterns in Rhombohedral Ferroelectrics
Resource
Applied Physics Letters 92 (5): 052909
Journal
Applied Physics Letters
Journal Volume
92
Journal Issue
5
Pages
-
Date Issued
2008
Date
2008
Author(s)
Abstract
A nonconventional phase-field model is developed to predict ferroelectric domain structures. It employs a set of field variables motivated by multirank laminates to represent energy-minimizing domain configurations, giving rise to an explicit expression of the energy-well structure. The framework is applied to domain simulation in the rhombohedral phase assuming that polarization is close to the ground states. An electromechanical self-accommodation pattern consisting of eight rhombohedral variants and an engineered domain configuration are predicted and found in good agreement with those observed in experiment.
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