Phase evolution and strong temperature‐dependent electrostrictive effect in (1− <i>x</i> )Pb(Mg <sub>1/3</sub> Nb <sub>2/3</sub> )O <sub>3</sub> ‐ <i>x</i> PbTiO <sub>3</sub> solid solutions
Yunyao Huang, Leiyang Zhang, Ruiyi Jing, Wenjing Shi, Denis Alikin, V. Ya. Shur, Xiaoyong Wei, Li Jin
Abstract
Abstract (1− x )Pb(Mg 1/3 Nb 2/3 )‐ x PbTiO 3 (PMN‐ x PT) ceramics with x ranging from 0.1 to 0.3 were synthesized by solid‐state reaction method. X‐ray diffraction, dielectric and ferroelectric property characterizations were systematically investigated. As x rises, the PMN‐ x PT transitions from a cubic to a rhombohedral phase, resulting in an enhancement in ferroelectricity. Our findings show that the electrostrain and longitudinal electrostrictive coefficient Q 33 both increase and then decrease within a critical region located between the depolarization temperature T FR and T m (corresponding to the maximum permittivity), demonstrating strong temperature‐dependent characteristics. In x = 0.2, the maximum Q 33 of 0.0361 m 4 /C 2 is obtained, and a phase diagram of studied system is built. Our findings not only shed light on the phase evolution in this system but also reveal a strong temperature‐dependent electrostrictive effect that can be used to improve electrostrains in PMN‐based solid solutions if the critical region can be regulated to a suitable temperature region using engineering strategies.