Pyroelectric Performances of Rhombohedral 0.42Pb(In1/2Nb1/2)O3-0.3Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 Single Crystals

Relaxor-based ferroelectric single crystals xPb(In1/2Nb1/2)O-3-yPb(Mg1/3Nb2/3)O-3-(1-x-y)PbTiO3 {PIMNT [100x/100y/100(1-x-y)]} have been grown by a modified Bridgman technique. The as-grown PIMNT (42/30/28) crystal with rhombohedral perovskite-type structure shows higher Curie temperature T-C similar to 187 degrees C, and higher ferroelectric rhombohedral-to-tetragonal phase transition temperature T-RT similar to 152 degrees C, both about 50 degrees C higher than those found for 0.71Pb(Mg1/3Nb2/3)O-3-0.29PbTiO(3) crystals. Moreover, as a core parameter of pyroelectric material, the detectivity figures-of- merit of PIMNT (42/30/28) crystal are higher than other typical relaxor-based ferroelectric crystals, which primarily stems from the lower dielectric loss, making it promising candidate for infrared detector applications.