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.
|Pages (from-to)||37 - 41|
|Number of pages||5|
|Journal||Optoelectronics and Advanced Materials, Rapid Communications|
|Publication status||Published - Jan 2008|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
Rakshit, B., Srivastava, V., Sanyal, S. P., Dilawar, N., Varandani, D., & 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.