(Frontier Institute of Science and Technology，Xi’an Jiaotong University， Xi’an 710054， China)
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DOI:
10.7502/j.issn.1674-3962.2013.06.04
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Abstract:
In this paper， we firstly give a brief review on the fundamentals and recent developments on polarization fatigue in ferroelectric materials. The LPDSICI model (LPDSICI stands for local phase decomposition induced by switchinginduced 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 LPDSICI model is that the unscreened bound charge formed at the tip of the needlelike domain at the very early stage of polarization reversal will induce an intensive charge injection (mostly electrons) near the electrodefilm 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 LPDSICI 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 switchinginduced charge injection may indeed be the generic reason for polarization fatigue in a variety of ferroelectric materials， and probably antiferroelectric materials as well.