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Research Article | Open Access

Effect of elastic domains on electromechanical response of epitaxial ferroelectric films with a three-domain architecture

Jun OUYANG*,a( )Wei ZHANGaS. Pamir ALPAYbAlexander L. ROYTBURD*,c( )
Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), Engineering Ceramics Laboratory, School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, China
Materials Science and Engineering Program and Institute of Materials Science, University of Connecticut, Storrs 06269, Connecticut, USA
Department of Materials Science and Engineering, University of Maryland, College Park 20742, Maryland, USA
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Thermodynamics of (001) epitaxial ferroelectric films completely relaxed due to the formation of elastic domains with a three-domain architecture is presented. The polydomain structure and electromechanical response of such films are analyzed for two cases corresponding to immobile and mobile elastic domain walls. It is shown that immobile elastic domains provide additional constraint which increases the mechanical and electrical clamping, thereby significantly reducing the piezoelectric and dielectric responses. On the other hand, a polydomain ferroelectric film adapts to the variations in the applied electric field by reversible domain wall displacements in the case of mobile domain walls. The comparison of the theory with experiments shows that the elastic domain walls are mobile in the fully relaxed films of ~ 1 μm thickness. In addition, if the substrate constraint is reduced via decreasing lateral size of a polydomain ferroelectric film, its piezoresponse will increase dramatically, as is experimentally verified on small islands of polydomain ferroelectric films. The general conclusions can be readily applied to other constrained polydomain films.


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Journal of Advanced Ceramics
Pages 1-10
Cite this article:
OUYANG J, ZHANG W, ALPAY SP, et al. Effect of elastic domains on electromechanical response of epitaxial ferroelectric films with a three-domain architecture. Journal of Advanced Ceramics, 2013, 2(1): 1-10.








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Received: 28 January 2013
Accepted: 31 January 2013
Published: 06 April 2013
© The author(s) 2013

Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.