铁电材料的极化疲劳：基本机理和最新进展-中国材料进展

文章信息/Info

Title:: Polarization Fatigue in Ferroelectrics: Fundamentals and Recent Developments

Author(s):: LOU Xiaojie; (Frontier Institute of Science and Technology，Xi’an Jiaotong University， Xi’an 710054， China)

摘要:: 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。

Abstract:: In this paper， we firstly give a brief review on the fundamentals and recent developments on polarization fatigue in ferroelectric materials. The LPDSICI model (LPDSICI stands for local phase decomposition induced by switchinginduced charge injection) developed by the present author and his colleagues has been introduced and discussed in detail. The main scenario proposed for polarization fatigue in ferroelectrics in the LPDSICI model is that the unscreened bound charge formed at the tip of the needlelike domain at the very early stage of polarization reversal will induce an intensive charge injection (mostly electrons) near the electrodefilm interface， and subsequently local Joule heating， and finally local phase decomposition around the domain nucleation site. By reviewing the recent progress on experimental studies of electrical fatigue in a variety of ferroelectric samples in both thin film and bulk form， we show that the LPDSICI model is in good agreement with most of the observations published in the last three years in the literature. Therefore， local phase decomposition induced by switchinginduced charge injection may indeed be the generic reason for polarization fatigue in a variety of ferroelectric materials， and probably antiferroelectric materials as well.