Structure of Relaxor Ferroelectric (1 – 2х)BiScO3 · хPbTiO3 · хPbMg0.33Nb0.67O3 with х = 0.42 in the Polarized and Depolarized States

Аннотация

An X-ray diffraction study of ceramic samples of relaxor ferroelectric (1 – 2х)BiScO₃ · хPbTiO₃ · хPbMg_0.33Nb_0.67O₃ with х = 0.42 in the polarized and depolarized states has been performed. It is established by Rietveld method that in both cases samples contain two perovskite-like phases, which are solid solutions. One of them has cubic symmetry. The second phase is characterized by the polar tetragonal sp. gr. P4mm in the polarized state and the monoclinic noncentrosymmetric sp. gr. Cm in the depolarized state.