A study of electromechanical switching in ferroelectric single crystals
Journal
Journal of the Mechanics and Physics of Solids
Journal Volume
56
Journal Issue
6
Pages
2117-2135
Date Issued
2008
Author(s)
Abstract
This article documents both modeling and experimental studies developed to investigate the switching behavior of ferroelectric single crystals. The theoretical model makes a priori ansatz that switching follows the evolution of a particular domain pattern. The choice of this configuration is dictated by the requirement that domains remain compatible during evolution, giving rise to a low-energy path for the overall switching. The construction of this pattern is achieved using multirank laminates. It offers an advantage of specifying different types of domain wall movements, leading to a distinction for the switching types. A loading experiment is performed on a barium titanate (BaTiO3) single crystal with a constant compressive stress and a cyclic electric field. Both 180{ring operator} and 90{ring operator} coercive fields are measured as input parameters required for the theoretical framework. The simulation results show good agreement with the observed strains measured by the present and other available experiments. It is found that depolarization has a non-trivial influence on attainable actuation strains. © 2008 Elsevier Ltd. All rights reserved.
SDGs
Type
journal article