Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16476
Title: Influence of temperature on the in-plane dielectric properties of barium strontium titanate thin films
Authors: Zhou, XY
Wang, DY
He, LX
Li, Y
Wang, Y 
Chan, HLW 
Choy, CL 
Keywords: Barium strontium titanate
Dielectric
Temperature dependence
Thin film
Issue Date: 2006
Publisher: Taylor & Francis
Source: Integrated ferroelectrics, 2006, v. 77, p. 157-164 How to cite?
Journal: Integrated ferroelectrics 
Abstract: (Ba0.7Sr0.3)TiO3 (BST 70/30) thin films were deposited on (LaAlO3)0.3(Sr2AlTaO 6)0.7 single crystal substrates by means of pulsed laser ablation. X-ray diffraction revealed that the BST 70/30 thin film was well crystallized and epitaxially aligned on the substrate. Compared with the cubic lattice structure of BST ceramics with the same composition, the lattice of BST 70/30 thin film was found to have been slightly distorted to a tetragonal symmetry. As a result of the distortion, the Curie temperature of the thin film was found to be 73°C, which is ∼40°C higher than that of the ceramics. The in-plane dielectric tunability of the thin film was found to be dependent on temperature. The largest tunability occurs at the Curie temperature. In the paraelectric state, the tunability is more sensitive to temperature than in the ferroelectric state.
Description: Seventeenth International Symposium on Integrated Ferroelectrics, ISIF-17, Shanghai, 17-20 April 2005
URI: http://hdl.handle.net/10397/16476
ISSN: 1058-4587
EISSN: 1607-8489
DOI: 10.1080/10584580500414374
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