The dielectric properties and phase transitions of (1−x)Pb(Yb1/2Ta1/2)O3−xPbZrO3

The dielectric properties and phase transition behaviors of antiferroelectric-antiferroelectric (1−x)Pb(Yb1/2Ta1/2)O3−xPbZrO3 [(1−x)PYT−xPZ] solid solution system (0.0⩽x⩽0.10) have been studied by X-ray diffraction, permittivity and E–P hysteresis measurement. With increasing the PbZrO3 amount, the initially split Bragg peaks (400) and (440) begin to merge into single lines. The temperature of the secondary phase transition of (1−x)PYT−xPZ whose character is relaxor-like decreases rapidly rather than that of the first order transition whose character is frequency independent with increasing the PbZrO3 addition. From the E–P hysteresis loop measurement, the remanent polarizations and the coercive field of the system go to zero as the temperature and Zr4+ concentration increase.