简要回顾了铁电材料中极化疲劳现象的基本机理和最新进展.详细地介绍了作者和其合作者最近创立的LPD-SICI模型(LPD-SICI是指极化翻转引起的电荷注入导致的局域相分离).LPD-SICI模型认为导致铁电材料中极化疲劳的主要原因是:在极化翻转早期形成的针状畴顶端的非屏蔽束缚电荷在电极-薄膜界面处会导致强烈的电荷注入(主要是电子),引起局域的焦耳热,最后在畴成核位置引发局域相分离.通过回顾过去几年在铁电材料电学极化疲劳方面实验研究的最新进展,得出LPD-SICI模型与过去三年中文献上发表的大多数实验观测相一致,并可以解释这些现象的起因.因此,极化翻转导致的局域相分离可能是各种类型铁电材料极化疲劳的共同起因.
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