Fluctuation-Dissipation Ratio of a Spin Glass in the Aging Regime

D. Hérisson and M. Ocio
Phys. Rev. Lett. 88, 257202 – Published 6 June 2002
PDFExport Citation

Abstract

We present the first experimental determination of the time autocorrelation C(t,t) of magnetization in the nonstationary regime of a spin glass. Quantitative comparison with the response, the magnetic susceptibility χ(t,t), is made by using a new experimental setup allowing both measurements in the same conditions. Clearly, we observe a nonlinear fluctuation-dissipation relation between C and χ, depending weakly on the waiting time t. Following theoretical developments on mean-field models, and lately on short range ones, it is predicted that in the limit of long times the χ(C) relationship should become independent of t. A scaling procedure allows us to extrapolate to the limit of long waiting times.

  • Received 15 February 2002

DOI:https://doi.org/10.1103/PhysRevLett.88.257202

©2002 American Physical Society

Authors & Affiliations

D. Hérisson and M. Ocio

  • DSM/Service de Physique de l'État Condensé, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France

References (Subscription Required)

Click to Expand
Issue

Vol. 88, Iss. 25 — 24 June 2002

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×