A-site cation with high vibrational motion in ABX<sub>3</sub> perovskite effectively induces dielectric phase transition
Yuzhen Wang, Zhi‐Xu Zhang, Chang‐Yuan Su, Tie Zhang, Da‐Wei Fu, Yi Zhang
Abstract
] (FMPD = 1-fluoroethyl-1-methylpiperidinium) undergoes two reversible phase transitions above room temperature with the substitution of methyl with fluoroethyl increasing the energy barrier of molecular motion. The individual crystal diffraction structures show that, unlike the phase change caused by the reorientation of organic cations in majority of known perovskites, this phase transition is triggered by the order/disorder of cations and anions related to the vibration increase by the introduction of fluoroethyl. The results provide a new design idea for the design and assembly of novel OIHPs-type phase change materials.
Topics & Concepts
Perovskite (structure)ABX testDielectricPhase transitionMaterials sciencePhase (matter)Condensed matter physicsChemical physicsOptoelectronicsChemistryCrystallographyPhysicsOrganic chemistryMathematicsStatisticsFerroelectric and Piezoelectric MaterialsPerovskite Materials and ApplicationsMicrowave Dielectric Ceramics Synthesis