Blog
About

  • Record: found
  • Abstract: found
  • Article: not found

Nonlinear dielectric response and thermodynamic heterogeneity in liquids.

1 ,

Physical review letters

Read this article at

ScienceOpenPublisherPubMed
Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      If large amplitude time-dependent fields (e.g., dielectric, magnetic, mechanical) are applied to a sample that displays relaxational modes, some energy of the external field is absorbed by the slow degrees of freedom. The weak coupling of these modes to the phonon bath leads to long persistence times of the resulting higher fictive temperature. Assuming heterogeneities regarding dielectric and thermal relaxation times, extremely strong nonlinear dielectric effects are predicted and experimentally verified. For glycerol at T = 213 K, the dielectric loss measured at 280 kV/cm increases by more than 6% over its low-field value. This nonlinearity shows a characteristic frequency dependence and implies that dielectric and thermal time constants are locally correlated in viscous liquids.

      Related collections

      Author and article information

      Affiliations
      [1 ] Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, USA.
      Journal
      Phys. Rev. Lett.
      Physical review letters
      0031-9007
      0031-9007
      Sep 1 2006
      : 97
      : 9
      17026377
      10.1103/PhysRevLett.97.095703

      Comments

      Comment on this article