Consideration on Domain Walls Orientations in CsPbCl₃ Ferroelastic Crystal in the Monoclinic Phase

Abstract

By the crystallographic consideration, all permissible domain walls were obtained for CsPbCl₃, a crystal that undergoes very complicated phase transition sequences. We constructed the possible domain structures and classified the domain walls into various types according to the domain structures. In particular, those by a fourfold wall, W_ƒ, which was found by considering the wall symmetry were constructed. The results also showed that the W' walls, which were defined in a continuous model of the mechanical properties, are the crystallographic planes with fixed indices.