Memory and superposition in a spin glass

Abstract

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.

REVTeX style; 8 pages, 4 figures

References in corpus (4)

• Aging phenomena in spin glass and ferromagnetic phases: domain growth and wall dynamics
• Magnetic Relaxation Phenomena in a CuMn Spin Glass
• Memory interference effects in spin glasses
• Relaxation of the field-cooled magnetization of an Ising spin glass

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