Size effects in polarization switching in ferroelectric thin films

The scenarios of the size effects which may account for the difference in the switching properties of ferroelectric thin films and bulk ferroelectrics are critically reviewed. It is shown that the two often used models (the Janovec-Kay-Dunn surface nucleation size effect and the dielectric layer model) are irrelevant to the experimentally observed thickness dependence of the coercive field in the films. The surface pinning model and the depletion-assisted nearby electrode nucleation model are shown to be consistent with the experimental observations. It is shown that the Miller-Weinreih law for wall velocity cannot be expected in thin films.


Published in:
Integrated Ferroelectrics, 16, 1-4, 237-244
Year:
1997
ISSN:
1058-4587
Keywords:
Note:
Tagantsev, AK Ecole Polytech Fed Lausanne,Lab Ceram,Ch-1015 Lausanne,Switzerland
Wr718
Times Cited:14
Cited References Count:19
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


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