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Structural phase evolution of strontium-doped lead titanate thin films prepared by the soft chemical technique

Published online by Cambridge University Press:  31 January 2011

F. M. Pontes ,
S. H. Leal ,
P. S. Pizani ,
M. R. M. C. Santos ,
E. R. Leite ,
E. Longo ,
F. Lanciotti Jr. ,
T. M. Boschi  and
J. A. Varela
F. M. Pontes
Affiliation:
Laboratório Interdisciplinar de Eletroquímica e Cerâmica (LIEC), Centro Multidisciplinar Para Desenvolvimento de Materiais Cerâmicos (CMDMC), Departamento de Química, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CP-676, CEP-13565–905, São Carlos, S. P., Brazil
S. H. Leal
Affiliation:
Laboratório Interdisciplinar de Eletroquímica e Cerâmica (LIEC), Centro Multidisciplinar Para Desenvolvimento de Materiais Cerámicos (CMDMC), Departamento de Química, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CP-676, CEP-13565–905, São Carlos, S. P., Brazil, and Centro de Ciências da Natureza (CCN), Departamento de Química, Universidade Federal do Piauí (UFPI), Teresina, PI, Brazil
P. S. Pizani
Affiliation:
Departamento de Física, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CEP-13565–905, São Carlos, S. P., Brazil
M. R. M. C. Santos
Affiliation:
Centro de Ciências da Natureza (CCN), Departamento de Química, Universidade Federal do Piauí (UFPI), Teresina, PI, Brazil
E. R. Leite
Affiliation:
Laboratório Interdisciplinar de Eletroquímica e Cerâmica (LIEC), Centro Multidisciplinar Para Desenvolvimento de Materiais Cerâmicos (CMDMC), Departamento de Química, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CP-676, CEP-13565–905, São Carlos, S. P., Brazil
E. Longo*
Affiliation:
Laboratório Interdisciplinar de Eletroquímica e Cerâmica (LIEC), Centro Multidisciplinar Para Desenvolvimento de Materiais Cerâmicos (CMDMC), Departamento de Química, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CP-676, CEP-13565–905, São Carlos, S. P., Brazil
F. Lanciotti Jr.
Affiliation:
Departamento de Física, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CEP-13565–905, São Carlos, S. P., Brazil
T. M. Boschi
Affiliation:
Departamento de Física, Universidade Federal de São Carlos (UFSCar), Via Washington, Km 235, CEP-13565–905, São Carlos, S. P., Brazil
J. A. Varela
Affiliation:
Instituto de Química, Universidade Estadual Paulista (UNESP), Araraquara, S. P., Brazil
*
a)Address all correspondence to this author. e-mail: liec@power.ufscar.br
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Abstract

Strontium-modified lead titanate thin films with composition Pb1−xSrxTiO3 were grown on Pt/Ti/SiO2/Si substrates using the polymeric precursor method. The structural phase evolution as a function of the Sr contents was studied using micro-Raman scattering, specular reflectance infrared Fourier transform spectroscopy, and x-ray diffraction. The results showed a gradual change from tetragonal to cubic structure, the transition occurring at about x = 0.58. The infrared reflectance spectra showed that the frequency of several peaks decreases as the strontium concentration increases. These features are correlated with a decrease in the tetragonal distortion of the TiO6 octahedra as the strontium concentration increases.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 3 , March 2003 , pp. 659 - 663
Copyright
Copyright © Materials Research Society 2003

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