A detailed investigation was made of the migration kinetics of oxygen vacancies in

Ba-doped Pb(Zr0.52Ti0.48)O3 ferroelectrics, using complex impedance spectroscopy.

The temperature-dependent dc electrical conductivity σdc suggested that Ba-doping

could significantly lower the density of oxygen vacancies, leading to a distinctly

reduced σdc and a slightly enhanced activation energy for the migration of oxygen

vacancies; thus benefiting the polarization fatigue resistance. Moreover, the

polarization fluctuation induced by the relaxation of oxygen vacancies was reduced

by the Ba doping. A Cole-Cole fitting to the dielectric loss revealed a strong

correlation among the oxygen vacancies, and the migration of oxygen vacancies

appeared to be a collective behaviour.

Characterization of Oxygen Vacancies and Their Migration in Ba-Doped

Pb(Zr0.52Ti0.48)O3 Ferroelectrics. M.F.Zhang, Y.Wang, K.F.Wang, J.S.Zhu,

J.M.Liu: Journal of Applied Physics, 2009, 105[6], 061639