Memory and superposition in a spin glass - art. no. 092401

Nonequilibrium dynamics in a Ag(Mn) spin glass are investigated by measurem ents of the temperature dependence of the remanent magnetization. Using spe cific cooling protocols before recording the thermo- or isothermal remanent magnetizations on reheating, it is found that the measured curves effectiv ely disclose nonequilibrium spin glass characteristics such as aging and me mory phenomena as well as an extended validity of the superposition princip le for the relaxation. The usefulness of this "simple" dc method is discuss ed, as well as its applicability to other disordered magnetic systems.