Deviations from perfect memory in spin glass temperature cycling experiments

M. Sasaki, V. Dupuis, J. P. Bouchaud, E. Vincent

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We study the deviations from perfect memory in negative temperature cycle spin glass experiments. It is known that the a.c. susceptibility after the temperature is raised back to its initial value is superimposed to the reference isothermal curve for large enough temperature jumps ΔT (perfect memory). For smaller ΔT, the deviation from this perfect memory has a striking non monotonous behavior: the 'memory anomaly' is negative for small ΔT's, becomes positive for intermediate ΔT's, before vanishing for still larger ΔT's. We show that this interesting behavior can be reproduced by simple Random Energy trap models. We discuss an alternative interpretation in terms of droplets and temperature chaos.

Original languageEnglish
Pages (from-to)469-479
Number of pages11
JournalEuropean Physical Journal B
Volume29
Issue number3
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • 05.70.Fh Phase transitions: General studies
  • 64.70.Pf Glass transitions
  • 75.50.Lk Spin glasses and other random magnets

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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