Growth and electrical properties characterization of Pb(In_1/2Nb_1/2)O₃–PbTiO₃ tetragonal single crystal by the modified flux-Bridgman method

Pb(In_1/2Nb_1/2)O₃–PbTiO₃ (PIN–PT) Corresponding author has not been indicated in the author group. Kindly provide the corresponding author's information. >single crystals with up to 35×20×20 mm³ were grown by the modified flux-Bridgman method under spontaneous nucleation for the first time. Phase structure of as-grown PIN–PT single crystal was tetragonal phase. From the bottom to top of crystal, PT content increases from 0.38 to 0.44 along growth direction. Curie temperature increased from 253.9 to 299.6 °C and ε_r at room temperature decreased from 5343 to 1219. Piezoelectric coefficient d₃₃ decreased from 1129pC/N to 610pC/N. Coercive field increased from 8.13 kV/cm to 16.96 kV/cm. Vertical 90° and anti-parallel 180° tetragonal domain with size of 100 µm were observed by PLM (Polar-Light Microscope). The results indicate that Pb(In_1/2Nb_1/2)O₃–PbTiO₃ tetragonal single crystal has higher curie temperature, coercive field and lower piezoelectric constant than that of its rhombohedral crystal.