Role of defect distributions and mobility on ferroelectric phase transformations in lead zirconate titanate
作者： Qi Tan , Z. Xu , Jie-Fang Li , Dwight Viehland
DOI: 10.1063/1.119728
关键词: Ferroelectricity 、 Dielectric spectroscopy 、 Lead zirconate titanate 、 Crystallographic defect 、 Zirconate 、 Condensed matter physics 、 Impurity 、 Transmission electron microscopy 、 Materials science 、 Polarization (electrochemistry) 、 Crystallography
摘要: Studies of the influence defect distributions and mobility on ferroelectric phase transformations in lead zirconate titanate have been performed by transmission electron microscopy, high resolution polarization switching measurements, dielectric spectroscopy. Investigations focused La3+ K1+ modified titanates. Defects which could be randomly quenched-in from temperatures significantly above that transformation resulted relaxor behavior characterized polar nanodomains. However, defects remained mobile until below a normal state was domain pinning. Mobile impurities/vacancies are revealed to order into chain fragments or clusters diffuse boundaries resulting pinning cooling.
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