Topology and temperature dependence of the diffuse X-ray scattering in Na_0.5Bi_0.5TiO₃ ferroelectric single crystals.

ABSTRACT: The results of high-resolution measurements of the diffuse X-ray scattering produced by a perovskite-based Na_0.5Bi_0.5TiO₃ ferroelectric single crystal between 40 and 620 K are reported. The study was designed as an attempt to resolve numerous controversies regarding the average structure of Na_0.5Bi_0.5TiO₃, such as the mechanism of the phase transitions between the tetragonal, P4bm, and rhombohedral | monoclinic, R3c | Cc, space groups and the correlation between structural changes and macroscopic physical properties. The starting point was to search for any transformations of structural disorder in the temperature range of thermal depoling (420-480 K), where the average structure is known t

SUBMITTER: Gorfman S 

PROVIDER: S-EPMC4747085 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature