A Raman spectroscopic study of C-type rare earth sesquioxides

Raman spectroscopy was used to study the variation in vibrational spectra of a series of rare earth sesquioxides of composition Ln 2O 3 (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 spectr...

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Bibliographic Details
Published in:Materials characterization 2008-04, Vol.59 (4), p.462-467
Main Authors: Dilawar, Nita, Mehrotra, Shalini, Varandani, D., Kumaraswamy, B.V., Haldar, S.K., Bandyopadhyay, A.K.
Format: Article
Language:English
Subjects:
AFM
ATOMIC FORCE MICROSCOPY
ATOMIC RADII
BCC LATTICES
Cross-disciplinary physics: materials science
rheology
DYSPROSIUM OXIDES
ELECTRONIC STRUCTURE
ERBIUM OXIDES
EUROPIUM OXIDES
Exact sciences and technology
GADOLINIUM OXIDES
HOLMIUM OXIDES
MATERIALS SCIENCE
MOLECULAR WEIGHT
PEAKS
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
RAMAN SPECTROSCOPY
Rare earth sesquioxides
SAMARIUM OXIDES
Solidification
SPECTRA
X-RAY DIFFRACTION
XRD
YTTRIUM OXIDES
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Summary:Raman spectroscopy was used to study the variation in vibrational spectra of a series of rare earth sesquioxides of composition Ln 2O 3 (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 A g and A g/F g 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.
ISSN:1044-5803
1873-4189
DOI:10.1016/j.matchar.2007.04.008