B. , Rakshit and Srivastava , V. and Sanyal , S. P. and Dilawar , N. and Varandani , D. and Bandyopadhyay, A. K. (2008) Lattice vibrational properties of some rare-earth antimonides: Raman scattering measurements and model theory. OPTOELECTRONICS AND ADVANCED MATERIALS – RAPID COMMUNICATIONS, 2 (1). 37 -41.

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Abstract

The lattice vibrational properties of three rare earth (RE) antimonides, namely LaSb, CeSb, and PrSb have been investigated experimentally, for the first time, using Raman Scattering technique at ambient pressure and room temperature. The experimental results show a single high intensity peak at zone center around 150 cm -1 (4.5 THz) for all the three antimonides. The experimental results have been analyzed by using breathing shell model (BSM), which includes the effect of Columb screening due to f-electron of RE ion and the breathing motion of the electron shell. The calculated phonon density of states agrees well with the measured Raman data. Calculated phonon dispersion curves for three RE antimonide compounds (LaSb, PrSb and NdSb) compare well with the available inelastic neutron scattering data. The calculated mean square displacements for these compounds show a systematic trend.

Item Type:	Article
Uncontrolled Keywords:	Rare earth compounds, Electron-phonon interaction, Inelastic neutron scattering
Subjects:	Materials Science Optics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	15 Apr 2015 09:50
Last Modified:	15 Apr 2015 09:50
URI:	http://npl.csircentral.net/id/eprint/1086

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