Structural recovery and fictive variables: The fictive electric field

Birte Riechers, Ranko Richert

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In the field of calorimetry and in physical aging studies, the departure from equilibrium is commonly measured by the fictive temperature, Tfic. For a quantity X, Tfic is the temperature at which X(Tfic) characterizes the nonequilibrium structure of a system, where X(T) reflects how the structure depends on T in equilibrium. Here, we demonstrate that the same concept can be applied to variables other than temperature. As an example, we discuss the case of introducing the fictive electric field for quantifying the process of structural recovery in response to removing the sample from its previous equilibrium state by the application of an electric field. The number of fictive fields required and the implications on nonlinear dielectric behavior are also discussed.

Original languageEnglish (US)
Pages (from-to)54-59
Number of pages6
JournalThermochimica Acta
StatePublished - Jul 2019


  • Dielectric relaxation
  • Fictive variables
  • Physical aging
  • Structural recovery

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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