Aging of the zero-field-cooled magnetization in Ising spin glasses: Experiment and numerical simulation

Growth of the zero-field-cooled magnetization (ZFCM) under continuous heati ng with and without an intermittent stop(s) is studied on Ising spin glasse s both experimentally and numerically. Despite the large difference between time scales of the experiment and the simulation, the ZFCM behavior observ ed in the two systems can be quantitatively interpreted by means of a commo n set of the scaling expressions based on the droplet picture. The results strongly suggest that the spin-glass coherence length reached by the labora tory time scales is about a hundred lattice spacings or less. Within this l ength scale no signature of the chaos effect (rejuvenation) has been found in the ZFCM measured. DOI: 10.1103/PhysRevLett.86.720.