Effect of densification on the density of vibrational states of glasses.
We studied the effect of densification on the vibrational dynamics of a Na(2)FeSi(3)O(8) 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.
Monaco
A
A
European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble, France.
Chumakov
A I
AI
Monaco
G
G
Crichton
W A
WA
Meyer
A
A
Comez
L
L
Fioretto
D
D
Korecki
J
J
Rüffer
R
R