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Related Experiment Videos

Aging and memory effects in a clathrate.

M C Rheinstädter1, A V Kityk, H Rieger

  • 1Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany. rheinstaedter@ill.fr

The European Physical Journal. E, Soft Matter
|March 11, 2004
PubMed
Summary

Aging effects like rejuvenation and memory, typically seen in spin glasses, were observed in methanol-beta-hydroquinone clathrate. This study reveals complex dynamics in orientational glasses even without a sharp glass transition.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Glass Physics

Background:

  • Orientational glasses exhibit complex dynamics.
  • Methanol-beta-hydroquinone clathrate is a model system for studying such phenomena.
  • Understanding aging effects is crucial for characterizing disordered materials.

Purpose of the Study:

  • To investigate the out-of-equilibrium low-frequency complex susceptibility of methanol-beta-hydroquinone clathrate.
  • To explore aging phenomena, including rejuvenation and memory effects, in this orientational glass.
  • To compare the observed aging effects with those found in spin glasses.

Main Methods:

  • Utilized temperature-stop protocols within aging experiments.
  • Measured the low-frequency complex susceptibility.

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  • Analyzed the material's response to temperature changes over time.

    • Main Results:

    • Observed significant aging effects, including rejuvenation and memory, at low temperatures.
    • Demonstrated that these effects occur despite the absence of a sharp glass transition.
    • Complex susceptibility measurements revealed characteristic aging behaviors.

    Conclusions:

    • Methanol-beta-hydroquinone clathrate exhibits spin-glass-like aging dynamics.
    • Aging phenomena are present in orientational glasses even without a distinct glass transition.
    • The study provides insights into the complex behavior of disordered systems.