High-temperature ferroelastic phase transition in a perovskite-like complex: [Et₄N]₂[PbBr₃]₂.

ABSTRACT: A new lead-bromide hybrid organic-inorganic complex [Et₄N]₂[PbBr₃]₂ (Et = ethyl) was synthesized, and its crystal structures could be described as a distorted perovskite-like one (at room temperature phase and at high temperature phase) and a step-like dielectric anomaly was obtained at around 375 K upon heating and 367 K upon cooling. It underwent a reversible structural phase transition with the Aizu notation of 6/mmmF2/m belonging to one of the 94 species of ferroelastic phase transitions, displayed switchable dielectric behaviors triggered by the motion or reorientation of the tetraethylammonium cations and the displacement of Pb²⁺ and Br^- ions in a solid-state crystal. Ferroelastic domain walls were also o

SUBMITTER: Huang Y 

PROVIDER: S-EPMC9062389 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature