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Aging behaviour in two- and three-dimensional ising spin glasses studied by Monte Carlo simulations.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för informationsteknologi och medier.
1992 (Engelska)Ingår i: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, Vol. 104-107, s. 1609-1610Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The nonequilibrium character of the spin glass dynamics has been studied in Monte Carlo simulations of two- and three-dimensional short-range Ising spin glass systems. The spin system was quenched in zero field to a temperature T. After equilibrating for a waiting time tw a weak magnetic field was applied and the time dependence of the magnetization M(t) was studied. Our results show that the relaxation rate, S(t) = ∂M(t)/∂log t, exhibits a maximum at a time t ≈ tw, which is consistent with results from experiments. If the temperature is increased or decreased prior to the field application, the apparent age ta of the system, as defined by the maximum in relaxation rate, is changed. The results are qualitatively in agreement with experiments as well as with theoretical models for the nonequilibrium spin glass dynamics

Ort, förlag, år, upplaga, sidor
1992. Vol. 104-107, s. 1609-1610
Nationell ämneskategori
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URN: urn:nbn:se:miun:diva-1770Lokalt ID: 477OAI: oai:DiVA.org:miun-1770DiVA, id: diva2:26802
Tillgänglig från: 2008-09-30 Skapad: 2008-09-30 Senast uppdaterad: 2011-01-10Bibliografiskt granskad

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