Abstract
A model of coexistence states near the morphotropic phase boundary (MPB) in perovskite-type ferroelectric crystals was studied using a simplified simulation based on the Landau–Ginzburg-type free energy functional. It was found that, even when no imperfection causing the random field exists, a stable phase and a metastable phase coexist near MPB. The coexistence state in the engineered domain configuration near MPB was also found.