Memory and superposition in a spin glass

Details Memory and superposition in a spin glass Memory and superposition in a spin glass

2000-07-05

arxiv.org/abs/cond-mat/0007070v2

Phys. Rev. B 63, 92401 (2001)

Physics

Condensed Matter

Materials Science

REVTeX style; 8 pages, 4 figures

Scientific paper

10.1103/PhysRevB.63.092401

Non-equilibrium dynamics in a Ag(Mn) spin glass are investigated by measurements of the temperature dependence of the remanent magnetisation. Using specific cooling protocols before recording the thermo- or isothermal remanent magnetisations on re-heating, it is found that the measured curves effectively disclose non-equilibrium spin glass characteristics such as ageing and memory phenomena as well as an extended validity of the superposition principle for the relaxation. The usefulness of this "simple" dc-method is discussed, as well as its applicability to other disordered magnetic systems.

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