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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Abstract

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.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier B.V.
Uncontrolled Keywords:	Raman spectroscopy; Rare earth sesquioxides; XRD; AFM
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	26 Dec 2012 09:52
Last Modified:	26 Dec 2012 09:52
URI:	http://npl.csircentral.net/id/eprint/927

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