On the features of the dielectric response of supercooled ethylcyclohexane

A. Mandanici, W. Huang, M. Cutroni, R. Richert

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The main relaxation observed in supercooled ethylcyclohexane in the 50 Hz-20 kHz frequency range using high-resolution dielectric spectroscopy displays an unusual relaxation pattern. The slope of the dielectric loss profile above the peak frequency, progressively tends to zero with increasing temperature. The observed features could be compatible with the existence of different underlying processes. A simple approach based on scaling is exploited to provide relevant information on the properties of the primary and secondary relaxation in ethylcyclohexane. The apparently anomalous behaviour is shown to be due to the superposition of a secondary process to the dielectric α-process and support the thesis that the β-relaxation observed in the glassy phase could have an intramolecular origin.

Original languageEnglish (US)
Pages (from-to)3961-3971
Number of pages11
JournalPhilosophical Magazine
Volume88
Issue number33-35
DOIs
StatePublished - Nov 1 2008

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Keywords

  • Dielectric relaxation
  • Ethylcyclohexane
  • High resolution dielectric spectroscopy
  • Intramolecular processes
  • Johari-Goldstein relaxation
  • Secondary relaxations

ASJC Scopus subject areas

  • Condensed Matter Physics

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