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Aging of the zero-field-cooled magnetization in Ising spin glasses: experiment and numerical simulation
L W Bernardi1, H Yoshino, K Hukushima
1Institute for Solid State Sciences, University of Tokyo, Kashiwa, Japan.
Abstract:
Growth of the zero-field-cooled magnetization (ZFCM) under continuous heating with and without an intermittent stop(s) is studied on Ising spin glasses both experimentally and numerically. Despite the large difference between time scales of the experiment and the simulation, the ZFCM behavior observed in the two systems can be quantitatively interpreted by means of a common set of the scaling expressions based on the droplet picture. The results strongly suggest that the spin-glass coherence length reached by the laboratory time scales is about a hundred lattice spacings or less. Within this length scale no signature of the chaos effect (rejuvenation) has been found in the ZFCM measured.
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