A Raman spectroscopic study of C-type rare earth sesquioxides

被引：116

作者：

Dilawar, Nita ^{[1
]}

Mehrotra, Shalini ^{[1
]}

Varandani, D. ^{[1
]}

Kumaraswamy, B. V. ^{[1
]}

Haldar, S. K. ^{[1
]}

Bandyopadhyay, A. K. ^{[1
]}

机构：

[1] Natl Phys Lab, New Delhi 110012, India

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 04期

关键词：

Raman spectroscopy; rare earth sesquioxides; XRD; AFM;

D O I：

10.1016/j.matchar.2007.04.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Raman spectroscopy was used to study the variation in vibrational spectra of a series of rare earth sesquioxides of composition Ln(2)O(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. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：462 / 467

页数：6

共 19 条

[1] A low cost laser-Raman spectrometer [J].