Fatigue as a local phase decompostion: a switching-induced charge-injection model

Lou, X. J. and Zhang, M. and Redfern, S. A. T. and Scott, J. F. (2007) Fatigue as a local phase decompostion: a switching-induced charge-injection model. Physical Review B, 75. p. 224104. DOI https://doi.org/10.1103/PhysRevB.75.224104

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Abstract

Following our recent experimental work on electrical fatigue [Phys. Rev. Lett. 97, 177601 (2006)], a theory of a charge-injection fatigue model is developed, emphasizing the extremely high depolarization electric field generated near the electrodes by bound charges at the tip of needlelike domains during switching. In particular, the relationship Pr(N)/Pr(0)˜exp(‑N/λ) , where N is the number of the fatigue cycles and λ≫1 , is derived, which explains the statistical origin of the universality of the logarithmic fatigue behavior observed for various ferroelectric substances in the literature. The consistency of this model with extensive body of the experimental data has been discussed and a systematic picture of fatigue is established. In particular, the “size effect”/fatigue coupling, the fatigue-free behavior of low Pr samples, and the exaggerated fatigue data of Colla [Appl. Phys. Lett. 72, 2478 (1998)] at very low frequencies (mHz) are all well predicted by our model.

Item Type:	Article
Uncontrolled Keywords:	2007 AREP IA52 IA54 2007 P
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Physical Review B
Volume:	75
Page Range:	p. 224104
Identification Number:	https://doi.org/10.1103/PhysRevB.75.224104
Depositing User:	Sarah Humbert
Date Deposited:	16 Feb 2009 13:03
Last Modified:	23 Jul 2013 10:07
URI:	http://eprints.esc.cam.ac.uk/id/eprint/489

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