Off-equilibrium fluctuation-dissipation relation in a spin glass

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.

Minor changes, accepted for publication in EPJ-B

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Cited by in corpus (20)

• The effective temperature
• Ageing Properties of Critical Systems
• Aging, rejuvenation and memory phenomena in spin glasses
• A statics-dynamics equivalence through the fluctuation-dissipation ratio provides a window into the spin-glass phase from nonequilibrium measurements
• Spin glasses : experimental signatures and salient outcomes
• Experimental Evidence of Fluctuation-Dissipation Theorem Violation in a Superspin Glass
• Growing dynamical length, scaling and heterogeneities in the 3d Edwards-Anderson model
• Fluctuation-Dissipation Relations and statistical temperatures in a turbulent von Kármán flow
• Understanding nonequilibrium scaling laws governing collapse of a polymer
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• The multiple symmetry sustaining phase transitions of spin ice
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• Spin-glass dynamics: experiment, theory and simulation
• On the superposition principle and non-linear response in spin glasses
• Entropy-based characterizations of the observable-dependence of the fluctuation-dissipation temperature