Abstract
In the present study, we systematically studied the ferroelectric and dielectric aging effect of BaTiO3 single crystals doped with different ratio of acceptor K+ and donor F-. We found that hybrid-doped BaTiO3 showed obvious aging effect only when the concentration of the acceptor K+ is higher than that of the donor; when the donor F- is richer than the acceptor K, the K-F doped BaTiO3 showed almost no aging effect. Based on a defect chemistry analysis and the microscopic mechanism of the aging, the difference in the aging behavior of the two kinds of crystals is fully explained.
