Effects of Elastic Coupling between BaTiO₃ Ferroelectric Film and a Substrate with Finite Thickness on Piezoelectric Coefficients

• Authors: Wei Zhang , Hua Zhang , Jun Ouyang , Fangren Hu
• Languages of publication: EN

Abstracts

EN

The effective piezoelectric coefficients of BaTiO₃ ferroelectric films epitaxially grown on different single crystal substrates with finite thickness have been theoretically analyzed. The effective longitudinal converse piezoelectric coefficients d₃₃ of film and "film-substrate" heterostructure all monotonously increased with increase of the film thickness fraction k, and the latter is always larger than the former at the range of 0 < k < 1. Meanwhile, we also found that the effective piezoelectric coefficients d₃₃ were affected by the substrates due to different elastic constants. These results show that the elastic deformation and clamping effect of substrate have significant impacts on the piezoelectric behavior of bilayer heterostructure.

Keywords

EN

barium titanate; ferroelectric heterostructures; constrained films; longitudinal piezoelectric coefficients; elastic deformation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 6
• Pages: 1426-1430

Dates

published

2017-06

received

2014-11-02

(unknown)

2017-04-14

Contributors

author

Wei Zhang

• School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
• Peter Grunberg Research Center, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

author

Hua Zhang

• School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

author

Jun Ouyang

• Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China

author

Fangren Hu

• School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
• Peter Grunberg Research Center, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

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Identifiers

DOI

10.12693/APhysPolA.131.1426