A Raman spectroscopic study of C-type rare earth sesquioxides
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
A Raman spectroscopic study of C-type rare earth sesquioxides
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| Creator |
Dilawar , Nita
Mehrotra, Shalini Varandani, D. Kumaraswamy, B. V. Haldar, S. K. Bandyopadhyay, A. K. |
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| Subject |
Materials Science
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| Description |
Raman spectroscopy was used to study the variation in vibrational spectra of a series of rare earth sesquioxides of composition Ln2O3 (where Ln = Y, Sm, Eu, Gd, Dy, Ho, Er and Yb) which were also characterized using X-ray diffraction (XRD), and Atomic Force Microscopy (AFM). The vibrational spectra of these body centered cubic structured sesquioxides are found to have one dominant peak corresponding to Ag and Ag/Fg symmetry vibrations. Correlation of this characteristic peak has been made with the variation of f-electron number as well as their ionic radii. It is observed that there is a systematic shift in Raman frequencies with the electronic configuration of these rare earth sesquioxides as well as with their molecular weight. An attempt has been made to explain these results from the concept of nano particles.
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| Publisher |
Elsevier
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/927/1/4.pdf
Dilawar , Nita and Mehrotra, Shalini and Varandani, D. and Kumaraswamy, B. V. and Haldar, S. K. and Bandyopadhyay, A. K. (2008) A Raman spectroscopic study of C-type rare earth sesquioxides. Materials Characterization , 59 (4). pp. 462-467. ISSN 1044-5803 |
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| Relation |
http://dx.doi.org/10.1016/j.matchar.2007.04.008
http://npl.csircentral.net/927/ |
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