Role of lower valent substituent-oxygen vacancy complexes in polarization pinning in potassium-modified lead zirconate titanate
作者： Qi Tan , Jianxing Li , Dwight Viehland
DOI: 10.1063/1.124394
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摘要: The dependence of polarization switching on thermal histories has been investigated for K1+-modified lead zirconate titanate (PZT) ceramics by Sawyer–Tower methods. It was found that double-loop-like characteristics in the aged condition could be reversed to normal single loop quenching specimens from above ferroelectric phase transition temperature. However, P–E curves back after reaging at elevated temperatures. Excess oxygen vacancies La3+-modified PZT were not result hysteresis, whereas excess did. These results provide evidence role K1+-oxygen vacancy complexes pinning.
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