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The scaling of the magnetic field dependence of the remanent magnetizationfor different temperatures and different spin-glass samples is studied.Particular attention is paid to the effect of the de Almeida-Thouless (AT)critical line on spin-glass dynamics. It is shown that results of themean-field theory of aging phenomena, with two additional experimentallyjustified assumptions, predict $H/H_{AT}(T)$ scaling for remanent magnetizationcurves. Experiments on a single crystal Cu:Mn 1.5 at % sample in thetemperature interval from $0.7T_{g}$ to $0.85T_{g}$ give results consistentwith this scaling. Magnetization vs. field curves for different Cu:Mn andthiospinel samples also scale together. These experimental results support thepredictions of the mean-field theory of aging phenomena.Comment: 8 pages, 10 figure

From linear to nonlinear response in spin glasses: Importance of mean-field-theory predictions