Enhanced antiferroelectric and electric-induced pyroelectric properties of Mn-substitued (Pb0.832Ba0.138La0.02)(Zr0.7Ti0.05Sn0.25)O3 ceramics

(Pb0.832Ba0.138La0.02)(Zr0.7Ti0.05Sn0.25)O-3 ceramics with stable antiferroelectric phase at room temperature were fabricated by Mn doping. The enhancement of antiferroelectric phase is attributed that the substitution of Mn ion into the B site decreased tolerance factor of the ceramics. The largest pyroelectric figure of merit of 25 x 10(-5) Pa-0.5 was obtained in (Pb0.832Ba0.138La0.02)(Zr0.7Ti0.05Sn0.25)O-3 antiferroelectric ceramics with 0.2 mol. % Mn doping, which is far higher than that of convention phase transition materials. The increase of the pyroelectric response was attributed to the improvement in dc field-induced dielectric enhancement effect and the reduction in dielectric loss. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4744948]