PMID: 10990994Sep 16, 2000Paper

Excess wing in the dielectric loss of glass formers: A johari-goldstein beta relaxation?

Physical Review Letters
U SchneiderA Loidl

Abstract

Dielectric loss spectra of glass-forming propylene carbonate and glycerol at temperatures above and below T(g) are presented. By performing aging experiments lasting up to five weeks, equilibrium spectra below T(g) have been obtained. During aging, the excess wing, showing up as a second power law at high frequencies, develops into a shoulder. The results strongly suggest that the excess wing, observed in a variety of glass formers, is the high-frequency flank of a beta relaxation.

References

Aug 27, 1990·Physical Review Letters·P K DixonJ P Carini
Apr 24, 2002·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·U SchneiderA Loidl

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