High piezoelectricity after field cooling AC poling in temperature stable ternary single crystals manufactured by continuous-feeding Bridgman method

After field cooling (FC) alternating current poling (ACP), we investigated the dielectric and piezoelectric properties of [001](pc)-oriented 0.24Pb(In1/2Nb1/2)O-3 (PIN)-0.46Pb(Mg1/3Nb2/3)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 degrees C, the PIMN-0.30PT SC attained high dielectric permittivity (epsilon(T)(33)/epsilon(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 degrees C, and high Curie temperature (T-C) of 180 degrees C. These values are the highest ever reported as PIMN-xPT SC system with T-pc > 100 degrees 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-xPT, and provides a route to a wide range of piezoelectric device applications.

Automated summary

By performing alternating current poling, the dielectric and piezoelectric properties of PIMN-0.30PT single crystals were significantly enhanced, resulting in excellent performance with high phase change temperature and Curie temperature.