Raman Spectroscopy of Perovskite-Type BaCexZr1−xO3(0≤x≤1)

• Published in: Journal of solid state chemistry Vol. 142; no. 1; pp. 220 - 227
• Main Authors: Charrier-Cougoulic, I, Pagnier, T, Lucazeau, G
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.01.1999; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Infrared and raman spectra and scattering; Inorganic compounds; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other nonmetallic inorganics; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides; Temperature dependence; Raman spectra; Phase diagrams; Inorganic compounds; Line shape; Lattice distortion; Phase transformations; Transition element compounds; Perovskites; XRD; Rare earth compounds; Experimental study; Solid solutions; Zirconium oxides; Barium oxides; Chemical composition; Quaternary compounds; Cerium oxides; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.1998.8038

Polycrystalline samples of BaCexZr1−xO3were prepared by solid state reaction. X-ray diffraction measurements show that all compounds are single-phase and XRD patterns can be indexed on the basis of the ideal perovskite structure. However, Raman data show that BaCexZr1−xO3exhibits slightx-dependent distortions from the ideal perovskite structure. Indeed the evolution of Raman spectra of BaCexZr1−xO3, asxdecreases at room temperature or as temperature increases for a givenxvalue, is similar to the evolution of Raman spectra of BaCeO3as temperature increases. These observations lead us to propose a phase diagram in the binary system BaCeO3–BaZrO3based on the known structures of BaCeO3(Pnma, Imma, R3c, andPm3m).