FT-Raman and FT-IR vibrational spectroscopic studies of nanocrystalline Ba2RESbO6 (RE = Sm, Gd, Dy and Y) perovskites |
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Authors: | C Vijayakumar H Padma Kumar Sam Solomon JK Thomas PRS Wariar Annamma John |
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Affiliation: | aDepartment of Physics, University College, Trivandrum 695034, Kerala, India;bDepartment of Physics, Mar Ivanios College, Trivandrum 695015, Kerala, India;cDepartment of Physics, St. John's College, Anchal 691306, Kerala, India |
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Abstract: | The nanoparticles of Ba2RESbO6 (RE = Sm, Gd, Dy and Y) were synthesized using auto ignition combustion process. The structure and phase purity of the as-prepared nanopowders were examined by X-ray diffraction pattern. A systematic analysis of the structure of the four compounds was carried out for the first time by recording Raman and IR spectra. The four Raman active modes A1g, Eg and 2F2g were observed as strong or medium intense bands in the Raman spectra and the IR active F1u(1) mode is obtained as a strong absorption band around 630 cm−1 in all the four compounds. Hence it is confirmed that the above compounds were crystallized in the cubic symmetry with space group. |
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Keywords: | Ceramics High-Tc superconductors Nanostructured materials Crystal structure |
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