Distributions of Electric and Elastic Fields at 90° Domain Boundaries in Ferroelectric Thin Layer—Various Configurations

In this paper we describe the application of the finite element method (FEM) in modelling spatial distributions of electric and elastic fields in a ferroelectric crystals with three domains separated by a 90° domain walls. There are three various configurations computed. The domain boundary is idealized as a two-dimensional defect in an electro-elastic continuum. It represents the source of inhomogenity and internal distortion in both elastic and electric fields. The main results are distributions of electric field, strain along the domain boundary.