Effect of field cooling AC poling on electrical and physical properties for Pb(Mg1/3Nb2/3)O3-PbTiO3 based single crystals manufactured by continuous-feeding Bridgman process

We have designed and fabricated a compact, 250 cm3 electric field cooling alternate current poling (FC ACP) system and obtained an enhanced dielectric permittivity (e T 33/e 0) of 7920 which was 10 to 33% larger than that of high temperature (HT) ACP of 0.70Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 (PMNT) single crystal (SC) with phase change temperature (T pc) of 93 °C. However, when the FC ACP temperature from 200 to 35 °C was applied for 0.31Pb(In1/2Nb1/2)O3-0.43Pb(Mg1/3Nb2/3)O3-0.26PbTiO3 (PIMNT) SC with a T pc of 136 °C, the e T 33/e 0 decreased by 55% compared with that of HT ACP. Temperature dependence of the e T 33/e 0 and phase analysis by X-ray diffraction of these SCs produced by a continuous-feeding Bridgman process showed clear different properties. We conclude the effects of FC ACP on the electrical and physical properties are different from the compositions, T pc, Curie temperature, etc., and it is required to find the best FC ACP condition according to each SC.