High piezoelectricity after field cooling AC poling in temperature stable ternary single crystals manufactured by continuous-feeding Bridgman method
Cong Luo, Tomoaki Karaki, Zhuangkai Wang, Yiqin Sun, Yohachi Yamashita, Jiayue Xu
Abstract
Abstract After field cooling (FC) alternating current poling (ACP), we investigated the dielectric and piezoelectric properties of [001] pc -oriented 0.24Pb(In 1/2 Nb 1/2 )O 3 (PIN)-0.46Pb(Mg 1/3 Nb 2/3 )O 3 (PMN)-0.30PbTiO3 (PT) (PIMN-0.30PT) single crystals (SCs), which were manufactured by continuous-feeding Bridgman (CF BM) within morphotropic phase boundary (MPB) region. By ACP with 4 kV rms /cm from 100 to 70 °C, the PIMN-0.30PT SC attained high dielectric permittivity (ε 33 T /ε 0 ) of 8330, piezoelectric coefficient ( d 33 ) of 2750 pC/N, bar mode electromechanical coupling factor k 33 of 0.96 with higher phase change temperature ( T pc ) of 103 °C, and high Curie temperature ( T C ) of 180 °C. These values are the highest ever reported as PIMN- x PT SC system with T pc > 100 °C. The enhancement of these properties is attributed to the induced low symmetry multi-phase supported by phase analysis. This work indicates that FC ACP is a smart and promising method to enhance piezoelectric properties of relaxor-PT ferroelectric SCs including PIMN- x PT, and provides a route to a wide range of piezoelectric device applications.