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      The Excess Wing in the Dielectric Loss of Glass-Formers: A Johari-Goldstein beta-Relaxation?

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          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.

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          Scaling in the relaxation of supercooled liquids

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            High-frequency dielectric spectroscopy on glycerol

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              Dipolar dynamics of low-molecular-weight organic materials in the glassy state

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                Author and article information

                Journal
                05 January 2000
                2000-03-02
                Article
                10.1103/PhysRevLett.84.5560
                cond-mat/0001055
                b6039125-2910-4203-8787-a69e3d3134ed
                History
                Custom metadata
                Phys. Rev. Lett. 84, 5560 (2000)
                submitted to Phys. Rev. Lett., 4 figures, revised version after referee reports
                cond-mat.soft cond-mat.dis-nn

                Condensed matter,Theoretical physics
                Condensed matter, Theoretical physics

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