| Issue |
Europhys. Lett.
Volume 39, Number 4, August II 1997
|
|
|---|---|---|
| Page(s) | 447 - 452 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00375-2 | |
| Published online | 01 September 2002 | |
High-frequency asymptotic shape of the primary relaxation in supercooled liquids
The James Franck Institute and The Department of Physics, The University
of Chicago - Chicago, IL 60637 USA
Received:
2
October
1996
Accepted:
27
June
1997
We characterize the high-frequency asymptotic shape of the primary
dielectric relaxation for four supercooled liquids: glycerol,
propylene carbonate, D-propylene glycol and tricresyl phosphate. Two
distinct power laws, with an exact relationship between their
exponents, exist above the peak in the imaginary part of the
permittivity, 
. The second power law is a robust
feature of the spectra, extending at least 13 decades above the peak
frequency, for all the liquids. The change with temperature of
in this high-frequency region provides direct
evidence for a proposed divergence in the static susceptibility in
supercooled liquids and suggests that in the simplest analysis the
approach to this divergence obeys Curie-Weiss behavior.
PACS: 77.22.Gm – Dielectric loss and relaxation / 64.60.-i – General studies of phase transitions / 64.70.Pf – Glass transitions
© EDP Sciences, 1997
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