"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Ambient temperature Raman scattering studies on Se70 Te30-x Pbx glass systems

D. SUSHAMA1, G. ACHAMMA1, P. PREDEEP1,* , V. G. SATHE2, A. DUBEY2

Affiliation

  1. Condensed Matter Physics Laboratory, Sree Narayana College Kollam. 691001, Kerala, India 691 001
  2. Raman Spectroscopy Laboratory, UGC-DAE Consortium for Scientific Research, Indore, M.P, India

Abstract

The effect of doping Se-Te glass system with Pb is investigated using Raman spectroscopy. The relation between rigidity percolation based on the prediction of the mean field constraint theory, and a relative degree of fragility, representing the structural relaxation of the network is demonstrated. An observed decrease of fragility with the increase of average coordination number up to 2.4 can be attributed to the predicted rigidity percolation threshold where the glass changes from floppy to rigid. The Raman spectra and possible glass structures are discussed for different Pb content. It is seen that the addition of lead results in the formation of Se-Pb and Te-Pb bonds..

Keywords

Se-Te-Pb glasses, Raman scattering, Pb doped Se-Te glass.

Submitted at: May 30, 2007
Accepted at: July 15, 2007

Citation

D. SUSHAMA, G. ACHAMMA, P. PREDEEP, V. G. SATHE, A. DUBEY, Ambient temperature Raman scattering studies on Se70 Te30-x Pbx glass systems, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2005-2007 (2007)