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Anomalies in the scaling of the α-relaxation studied by dielectric spectroscopy

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  • Schönhals, A.
  • Kremer, F.
  • Hofmann, A.
  • Fischer, E.W.

Abstract

The scaling of the α-relaxation for propylene carbonate, glycerol and propylene glycol is evaluated by broadband dielectric spectroscopy in a frequency range from 10-5 Hz to 1010 Hz. At low temperature the mean relaxation frequency ƒp follows the well-known Vogel-Fulcher-Tamann law whereas at high temperatures ƒp can be described by an Arrhenius law or by a power law predicted by the mode coupling theory. Both regions can be separated by a crossover temperature. Also the dielectric relaxation strength shows approximately in this temperature range a change in their temperature dependencies.

Suggested Citation

  • Schönhals, A. & Kremer, F. & Hofmann, A. & Fischer, E.W., 1993. "Anomalies in the scaling of the α-relaxation studied by dielectric spectroscopy," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 201(1), pages 263-269.
    • Handle: RePEc:eee:phsmap:v:201:y:1993:i:1:p:263-269
    DOI: 10.1016/0378-4371(93)90421-Y
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