Finite-element modeling of ferroelectric material behavior at morphotropic phase boundaries between tetragonal, rhombohedric and orthorhombic phases

Abstract

Abstract The nonlinear response of ferroelectric/ferroelastic material below the Curie temperature is analyzed at morphotropic phase boundaries with account of tetragonal, rhombohedric and orthorombic phases. The results are obtained by means of finite-element homogenization with using the micromechanical model taking into account the dissipative nature of the domain wall motion. The results of simulation have revealed the extremal values of spontaneous polarization and remanent strain at morphotropic phase boundaries for the tetragonal/rhombohedral and tetragonal/orthorhombic compositions.