PolyU IR

PolyU Institutional Repository >
Applied Physics >
AP Journal/Magazine Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4169

Title: Impact of in-plane anisotropic strains on the dielectric and pyroelectric properties of Ba₀.₇Sr₀.₃TiO₃thin films
Authors: Cao, Hai-xia
Lo, Veng-cheong
Li, Zhen-ya
Subjects: Barium compounds
Strontium compounds
Dielectric thin films
Epitaxial layers
Solid-state phase transformations
Internal stresses
Issue Date: 1-Jan-2007
Publisher: American Institute of Physics
Citation: Journal of applied physics, 1 Jan. 2007, v. 101, no. 1, 014113, p. 1-7.
Abstract: A modified Landau-Devonshire phenomenological thermodynamic theory is used to describe the influence of in-plane anisotropic strains on the dielectric and pyroelectric properties of epitaxial Ba₀.₇Sr₀.₃TiO₃thin films grown on dissimilar tetragonal substrates. The in-plane anisotropic strain factor-temperature phase diagram is developed. The in-plane anisotropic strains play a crucial role in the dielectric and pyroelectric properties of BST thin films. The theoretical maximum dielectric tunability approaching 100% can be attained at the critical anisotropic strain factor corresponding to the structural phase transformation from ca₁to a₁phase. Moreover, the anisotropic strain factor has an opposite effect on the figure of merit and pyroelectric coefficient, respectively. Furthermore, in the case of isotropic strains, our theoretical results are well consistent with the experimental results.
Description: DOI: 10.1063/1.2407272
Rights: © 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in H. X. Cao, V. C. Lo & Z. Y. Li, J. Appl. Phys. 101, 014113 (2007) and may be found at http://link.aip.org/link/?jap/101/014113.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/4169
ISSN: 0021-8979 (print)
1089-7550 (online)
Appears in Collections:AP Journal/Magazine Articles

Files in This Item:

File Description SizeFormat
Cao_Impact_in-plane_anisotropic.pdf118.62 kBAdobe PDFView/Open

Facebook Facebook del.icio.us del.icio.us LinkedIn LinkedIn

All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
No item in the PolyU IR may be reproduced for commercial or resale purposes.


© Pao Yue-kong Library, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Powered by DSpace (Version 1.5.2)  © MIT and HP
Feedback | Privacy Policy Statement | Copyright & Restrictions - Feedback