Growth and piezo-/ferroelectric properties of PIN-PMN-PT single crystals

Ternary solid solution crystals of 0.19Pb(In1/2Nb1/2)O-3- 0.46Pb(Mg1/3Nb2/3)O-3 - 0.35PbTiO(3) [PIMNT(19/46/35)] with dimensions of 35 x 38 x 15 mm(3) were grown by the top-seeded solution growth (TSSG) method. The dielectric, piezo- and ferroelectric properties of the grown crystals were characterized. The ternary piezocrystals exhibit a Curie temperature T-C = 190 degrees C and a tetragonal-rhombohedral phase transition temperature TR-T = 130 degrees C, which are increased significantly compared with T-C approximate to 155 degrees C and TR-T 80 degrees C of PMN-PT crystals. The dielectric constant (epsilon') and dielectric loss tangent (tan delta) are 4300 and 0.40 at room temperature. The piezoelectric coefficient d(33) is found to be 2380 pC/N. The longitudinal electromechanical coupling factor k(33) reaches 90% at room temperature. A peak-to-peak bipolar strain value of 0.13% is obtained at E approximate to +/- 14 kV/cm. The coercive field Ec and remanent polarization Pr are 5.50 kV/cm and 27.10 mu C/cm(2), respectively, which are also improved from the vales of PMN-PT crystals. (C) 2012 American Institute of Physics. [doi :10.1063/1.3681290]