Distribution of double-well potentials in SiO2 and SiO2: Ge glasses

✍ Scribed by Y. Kogure; T. Kosugi; H. Kobayashi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 179 KB
• Volume: 219-220
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00731-8

✦ Synopsis

The temperature dependence of the internal friction and the elastic modulus of pure SiO2 and SiO2 : Ge glasses measured by 50 kHz composite oscillator method have been analyzed on the basis of the double-well potential model. The density of relaxation strength and the distribution of the asymmetry parameter have been determined uniquely for pure SiO2, SIO2-5%GEO2, and SiO2-10%GeO2 specimens by fitting the asymmetric potential model to the internal friction and elastic modulus data. The asymmetry parameter is found to increase with the doping of Ge atoms.