Enhanced pyroelectric properties and thermal stability of Mn-doped 0.29Pb(In_(1/2)Nb_(1/2))O_3-0.29Pb(Mg_(1/3)Nb_(2/3))O_3-0.42PbTiO_3 single crystals

摘要

The pyroelectric properties and thermal stability of a [001]-oriented tetragonal 1mol. % Mn-doped 0.29Pb(In1/2Nb1/2)O-3-0.29Pb(Mg1/3Nb2/3)O-3-0.42PbTiO(3) [Mn-PIN-PMN-PT(29/29/42)] ternary single crystal were investigated. The single crystal exhibited a high pyroelectric coefficient of p = 6.0 x 10(-4) C m(-2) K-1 and figures of merit (FOMs) at 1 kHz for a current responsivity of F-i = 2.4 x 10(-10) mV(-1), a voltage responsivity of F-v = 0.08 m(2) C-1, and a detectivity of F-d = 19.8 x 10(-5) Pa-1/2 which were weakly dependent on frequency. These all increased linearly upon increasing temperature to 120 degrees C. Furthermore, the values of p for the ternary single crystal were weakly dependent on thermal annealing temperatures (T-a), maintaining over 75% of the original value at T-a 160 degrees C, which was 70 degrees C higher than that of the [111]-oriented rhombohedral 1mol. % Mn-doped 0.73Pb(Mg1/3Nb2/3)O-3-0.27PbTiO(3) [Mn-PMN-PT(73/27)] binary single crystal. These excellent pyroelectric properties, together with good thermal stability and wide operational temperature, make the [001]-oriented tetragonal Mn-PIN-PMN-PT(29/29/42) single crystal a promising candidate for pyroelectric detection and thermal imaging applications. Published by AIP Publishing.