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Symmetrical Temperature-Chaos Effect with Positive and Negative Temperature Shifts in a Spin Glass

P. E. Jönsson·H. Yoshino·P. Nordblad
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Abstract

The aging in a Heisenberg-like spin glass Ag(11 at% Mn) is investigated by measurements of the zero field cooled magnetic relaxation at a constant temperature after small temperature shifts $|ΔT/T_g| < 0.012$. A crossover from fully accumulative to non-accumulative aging is observed, and by converting time scales to length scales using the logarithmic growth law of the droplet model, we find a quantitative evidence that positive and negative temperature shifts cause an equivalent restart of aging (rejuvenation) in terms of dynamical length scales. This result supports the existence of a unique overlap length between a pair of equilibrium states in the spin glass system.

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P. E. Jönsson, H. Yoshino, P. Nordblad. 2002-08-12. Symmetrical Temperature-Chaos Effect with Positive and Negative Temperature Shifts in a Spin Glass. https://doi.org/10.1103/physrevlett.89.097201

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