Journal
PHYSICAL REVIEW B
Volume 70, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.70.174402
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Extensive experimental and numerical studies of the nonequilibrium dynamics of spin glasses subjected to temperature or bond perturbations have been performed to investigate chaos and memory effects in selected spin-glass systems. Temperature shift and cycling experiments were performed on the strongly anisotropic Ising-like system Fe0.5Mn0.5TiO3 and the weakly anisotropic Heisenberg-like system Ag(11 at% Mn), while bond shift and cycling simulations were carried out on a four-dimensional Ising Edwards-Anderson spin glass. These spin-glass systems display qualitatively the same characteristic features, and the observed memory phenomena are found to be consistent with predictions from the ghost-domain scenario of the droplet scaling model.
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