Full aging in spin glasses

The discovery of dynamic memory effects in the magnetization decays of spin glasses in 1983 marked a turning point in the study of the highly disordered spin glass state. Detailed studies of the memory effects have led to much progress in understanding the qualitative features of the phase space. Ev...

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Bibliographic Details
Published in:Physical review letters 2003-07, Vol.91 (3), p.037203-037203, Article 037203
Main Authors: Rodriguez, G F, Kenning, G G, Orbach, R
Format: Article
Language:English
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Summary:The discovery of dynamic memory effects in the magnetization decays of spin glasses in 1983 marked a turning point in the study of the highly disordered spin glass state. Detailed studies of the memory effects have led to much progress in understanding the qualitative features of the phase space. Even so, the exact nature of the magnetization decay functions has remained elusive, causing confusion. In this Letter, we report strong evidence that the thermoremanent magnetization decays scale with the waiting time t(w). By employing a series of cooling protocols, we demonstrate that the rate at which the sample is cooled to the measuring temperature plays a major role in the determination of scaling. As the effective cooling time t(eff)(c) decreases, t/t(w) scaling improves and for t(eff)(c)
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.91.037203