We studied the effect of densification on the vibrational dynamics of a Na2FeSi3O8 glass. The density of vibrational states (DOS) has been measured using nuclear inelastic scattering. The corresponding changes in the microscopic, intermediate-range, and macroscopic properties have also been investigated. The results reveal that, in the absence of local structure transformations, the Debye level and the glass-specific excess of vibrational states above it have the same dependence on density, and the evolution of the DOS is fully described by the transformation of the elastic medium.
Effect of Densification on the Density of Vibrational States of Glasses
COMEZ, Lucia;FIORETTO, Daniele;
2006
Abstract
We studied the effect of densification on the vibrational dynamics of a Na2FeSi3O8 glass. The density of vibrational states (DOS) has been measured using nuclear inelastic scattering. The corresponding changes in the microscopic, intermediate-range, and macroscopic properties have also been investigated. The results reveal that, in the absence of local structure transformations, the Debye level and the glass-specific excess of vibrational states above it have the same dependence on density, and the evolution of the DOS is fully described by the transformation of the elastic medium.File in questo prodotto:
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