Role of an intermediate phase (Ba,Sr)2Ti2O5CO3 in doped (Ba0.7Sr0.3)TiO3 thin films

San-Yuan Chen; Hong Wen Wang; Li Chi Huang

doi:10.1016/S0254-0584(02)00009-3

Role of an intermediate phase (Ba,Sr)₂Ti₂O₅CO₃ in doped (Ba_0.7Sr_0.3)TiO₃ thin films

San-Yuan Chen, Hong Wen Wang^*, Li Chi Huang

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

(Ba_0.7Sr_0.3)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°C, 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)₂Ti₂O₅CO₃. 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)₂Ti₂O₅CO₃.

Original language	English
Pages (from-to)	632-638
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	77
Issue number	3
DOIs	https://doi.org/10.1016/S0254-0584(02)00009-3
State	Published - 30 Jan 2003

Keywords

(Ba,Sr)TiOCO
BST thin film
Intermediate phase
MOD

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10.1016/S0254-0584(02)00009-3

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@article{9eabac7f1d9440aea66fdcd97ecf5a38,

title = "Role of an intermediate phase (Ba,Sr)2Ti2O5CO3 in doped (Ba0.7Sr0.3)TiO3 thin films",

abstract = "(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°C, 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)2Ti2O5CO3. 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)2Ti2O5CO3.",

keywords = "(Ba,Sr)TiOCO, BST thin film, Intermediate phase, MOD",

author = "San-Yuan Chen and Wang, {Hong Wen} and Huang, {Li Chi}",

year = "2003",

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TY - JOUR

T1 - Role of an intermediate phase (Ba,Sr)2Ti2O5CO3 in doped (Ba0.7Sr0.3)TiO3 thin films

AU - Chen, San-Yuan

AU - Wang, Hong Wen

AU - Huang, Li Chi

PY - 2003/1/30

Y1 - 2003/1/30

N2 - (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°C, 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)2Ti2O5CO3. 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)2Ti2O5CO3.

AB - (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°C, 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)2Ti2O5CO3. 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)2Ti2O5CO3.

KW - (Ba,Sr)TiOCO

KW - BST thin film

KW - Intermediate phase

KW - MOD

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U2 - 10.1016/S0254-0584(02)00009-3

DO - 10.1016/S0254-0584(02)00009-3

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JO - Materials Chemistry and Physics

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