Off-equilibrium fluctuation-dissipation relation in a spin glass
Disordered Systems and Neural Networks
2009-11-10 v2
Abstract
We report new experimental results obtained onthe insulating spin glass CdCrInS_4. Our experimental setup allows a quantitative comparison between thethermo-remanent magnetization and the autocorrelation of spontaneous fluctuations of magnetization, yielding acomplete determination of the fluctuation-dissipationrelation. The dynamics can be studied both in thequasi-equilibrium regime, where the fluctuation-dissipation theorem holds, and in the deeply aging regime. The limit of separation of time-scales, as used in analytical calculations, can be approached by use of a scaling procedure.
Cite
@article{arxiv.cond-mat/0403112,
title = {Off-equilibrium fluctuation-dissipation relation in a spin glass},
author = {Didier Herisson and Miguel Ocio},
journal= {arXiv preprint arXiv:cond-mat/0403112},
year = {2009}
}
Comments
Minor changes, accepted for publication in EPJ-B