Applied Physics A

, Volume 63, Issue 5, pp 471–474

Stretched-exponential approach in relaxing systems

  • Ó. Alejos
  • C. de Francisco
  • P. Hernández
  • K. Bendimya
  • J. M. Muñoz
Regular Papers

DOI: 10.1007/BF01571676

Cite this article as:
Alejos, Ó., de Francisco, C., Hernández, P. et al. Appl. Phys. A (1996) 63: 471. doi:10.1007/BF01571676

Abstract

The stretched-exponential or Kohlrausch-Williams-Watts function has been widely used in the description of a large variety of relaxation phenomena in condensed matter physics. In this work, we consider this approach as a fundamental law and extend its applicability range to thermally activated relaxation processes. A non-iterative and robust technique is developed in order to obtain the characteristic parameters of this type of phenomena. The method is based on a set of closed-form expressions for the amplitude, activation energy, pre-exponential factor and stretched-exponent that can be directly computed from isothermal curves. This strategy is applied to describe the magnetic disaccommodation spectra observed around room temperature in a magnetite sample.

PACS

02.60.Ed 75.60.L 

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • Ó. Alejos
    • 1
  • C. de Francisco
    • 1
  • P. Hernández
    • 1
  • K. Bendimya
    • 1
  • J. M. Muñoz
    • 1
  1. 1.Dpto. Electricidad y Electrónica, Facultad de CienciasUniversidad de ValladolidValladolidSpain

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