Brillouin light scattering study of glassy sorbitol

Brillouin light scattering has been used to investigate the density fluctuations of the fragile glass-former sorbitol in the GHz frequency range and at temperatures between 20 and 294 K. Longitudinal acoustic sound velocity and attenuation data are here reported and discussed. These data are used to...

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Bibliographic Details
Published in:Philosophical magazine (2003. Print) 2008-11, Vol.88 (33-35), p.3939-3946
Main Authors: Ruta, B., Monaco, G., Scarponi, F., Fioretto, D.
Format: Article
Language:English
Subjects:
acoustic properties
Condensed matter: structure, mechanical and thermal properties
Deformation and plasticity (including yield, ductility, and superplasticity)
Elasticity, elastic constants
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Glass transitions
glasses
light scattering
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Physics
Specific phase transitions
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Summary:Brillouin light scattering has been used to investigate the density fluctuations of the fragile glass-former sorbitol in the GHz frequency range and at temperatures between 20 and 294 K. Longitudinal acoustic sound velocity and attenuation data are here reported and discussed. These data are used to test the existence of a correlation between elastic properties of glasses and viscous properties of the corresponding deeply undercooled melts above the glass transition temperature, T g . In particular, and as for other fragile systems, the ratio of the vibrational to the relaxational compressibility at T g is found to be basically independent of fragility.
ISSN:1478-6435
1478-6443
1478-6433
DOI:10.1080/14786430802317586