Influence of temperature on quasi-elastic scattering in GeO₂ glass

Abstract

We report Raman scattering spectra for the network glass former vitreous germania (v-GeO₂) measured in the 10–1200 K temperature range. The results show an interesting temperature dependence of the quasi-elastic scattering. Comparing this study with acoustical attenuation measured by ultrasonic absorption and Brillouin light scattering, we found that the mechanism giving rise to quasi-elastic scattering in this system seems to be the same as the one causing the acoustic attenuation.

Keywords:

• glasses
• vitreous germania
• quasi-elastic scattering
• Raman light scattering