標題: Role of an intermediate phase (Ba,Sr)(2)Ti2O5CO3 in doped (Ba0.7Sr0.3)TiO3 thin films
作者: Chen, SY
Wang, HW
Huang, LC
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: intermediate phase;(Ba,Sr)(2)Ti2O5CO3;BST thin film;MOD
公開日期: 30-Jan-2003
摘要: (Ba0.7Sr0.3)TiO3 (BST) thin films doped with La, Nb, and Mg ions were prepared by metal-organic deposition method (MOD) on Pt/Ti/SiO2/Si substrates. An intermediate phase formed under an annealing temperature of 550-650 degreesC, and disappeared at higher temperatures during the formation of BST. The intermediate phase was analyzed by X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM), Fourier transform-infrared spectroscopy (FT-IR) and Raman spectra and found to be an oxycarbonate with a chemical formula of (Ba,Sr)(2)TiO5CO3. The stability of this intermediate phase increased with the addition of dopants, irrespective of doping types. It is proposed that distortion of crystal structure, physical constraint in the two-dimensions and small grain size favor the existence of poor crystallized (Ba,Sr)(2)Ti2O5CO3. (C) 2002 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0254-0584(02)00009-3
http://hdl.handle.net/11536/28154
ISSN: 0254-0584
DOI: 10.1016/S0254-0584(02)00009-3
期刊: MATERIALS CHEMISTRY AND PHYSICS
Volume: 77
Issue: 3
起始頁: 632
結束頁: 638
Appears in Collections:Articles


Files in This Item:

  1. 000178843700003.pdf