Distribution of double-well potentials in SiO2 and SiO2: Ge glasses
1996
Abstract The temperature dependence of the internal friction and the elastic modulus of pure SiO 2 and SiO 2 : 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 SiO 2 , SiO 2 5% GeO 2 , and SiO 2 10%GeO 2 specimens by fitting the asymmetry potential model to the internal friction and elastic modulus data. The asymmetry parameter is found to increase with the doping of Ge atoms.
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