The Change in Domain Structures from Tweed in Rhombohedral Phase to Twin Structure in Orthorhombic One with Stress in Relaxor Ferroelectric Solid Solutions

摘要

Rhombohedral ellipsoidal domains, tetragonal circular ones, orthorhombic star ones, and dark domains consisted of fluxes of platelets were found to be induced on the (001)_(cub), plane in 24PIN-46PMN-30PT crystals by shear stresses applied along [001]_(cub), direction through Vickers micro-indentation. Bright star orthorhombic domains along [110]_(cub) direction and the dark domains of nano-inclusions along [100]_(cub), and[110]_(cub) directions correspond to the creation and annihilation of thin platelet domains for the shuffling model, respectively. Two kinds of dielectric dispersions were found in depoled 24PIN-46PMN-30PT: one is the relaxor type and the other normal one at higher temperatures than the relaxor type.