Electrical properties of the ferroelectric bulk in europium-modified lead titanate ceramics

By using impedance spectroscopy technique we have investigated temperature dependence of various dielectric parameters in Pb0.88Eu0.08Ti1−yMnyO3 ceramic system. Two contributions R1C1 and R2C2, which contain the AC response of the ferroelectric bulk were observed for the first time in the modified lead titanate ceramics. Microstrains originating from structural defects in unpoled samples are responsible for the electrical inhomogeneity observed in the ferroelectric grains, which should worsen after poling process; this was followed by the piezoelectric anisotropy observed in modified lead titanate.