Pontes, Fenelon Martinho Lima [UNESP]Galhiane, Mario Sergio [UNESP]Santos, L. S. [UNESP]Rissato, R. S. [UNESP]Pontes, D. S. L. [UNESP]Longo, Elson [UNESP]Leite, E. R.Pizani, P. S.Chiquito, A. J.Machado, M. A. C.2014-05-202014-05-202008-04-15Materials Chemistry and Physics. Lausanne: Elsevier B.V. Sa, v. 108, n. 2-3, p. 312-318, 2008.0254-0584http://hdl.handle.net/11449/39949Detailed room temperature micro-Raman scattering, X-ray diffraction, atomic force microscopy and specular reflectance infrared Fourier transform spectroscopy studies were carried out on soft chemical by processed Pb1-xBaxTiO3 thin films. The micro-Raman spectra pointed the existence of a stable tetragonal ferroelectric phase in the entire composition range (0 < x <= 1). The infrared reflectance spectra showed that the frequency of several peaks decreases as the Ba2+ concentration increases. These features are correlated to a decrease in the tetragonal distortion of the TiO6 octahedra as the Ba2+ concentration increases. Furthermore, as x increases from 0.70 to 1.0, the Raman spectrum shows an evolution towards the well-known Raman spectrum of the tetragonal BaTiO3. Therefore, we demonstrated that the combination of solid solution PbTiO3-BaTiO3 with a grain size in the order of 30-40 nm supports the tetragonal ferroelectric phase at room temperature. (C) 2007 Elsevier B.V. All rights reserved.312-318engthin filmschemical synthesismicrostructurephase transitionsArtigo10.1016/j.matchemphys.2007.10.004WOS:000255081500027Acesso restrito1159480346990821361227705683809713985083484100660000-0001-6086-5303