Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28331
Title: Compositionally graded epitaxial barium strontium titanate thin films derived from pulsed laser deposition
Authors: Lu, SG
Zhu, XH
Mak, CL 
Wong, KH
Chan, HLW 
Choy, CL 
Keywords: BST
Compositional gradient
Dielectric constant
PLD
Thin films
Issue Date: 2003
Publisher: Elsevier
Source: Materials chemistry and physics, 2003, v. 79, no. 2-3, p. 164-168 How to cite?
Journal: Materials chemistry and physics 
Abstract: Epitaxial graded barium strontium titanate (BaxSr1-x)TiO3 (x = 0.75, 0.8, 0.9, 1.0) thin films were prepared through pulsed laser deposition method on the (La0.7Sr0.3)MnO3 (LSMO)/LaAlO3 (LAO) substrate. XRD analysis indicated the graded film had a broadened 2θ peak at 45° for the (2 0 0) peak. The energy dispersive analysis of X-ray (EDAX) showed a gradient change of Ba/Sr composition. P-E loop measurement gave a remnant polarization about 2μC cm-2, and without big up offset observed. A big room temperature dielectric constant as high as 1600 was obtained and has an approximately linear relationship with temperature from room temperature to 130°C. All these results can be ascribed to the epitaxial and graded structure of BST thin films.
URI: http://hdl.handle.net/10397/28331
ISSN: 0254-0584
EISSN: 1879-3312
DOI: 10.1016/S0254-0584(02)00279-1
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