Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 74, Issue 4, Pages 1131-1134Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.74.1131
Keywords
Ising spin glass; field-cooled magnetization; droplet picture; glassy dynamics
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The field-cooled magnetization (FCM) processes of Ising spin glasses under relatively small fields are investigated by experiment on Fe0.55Mn0.45TiO3 and by numerical simulation on the three-dimensional Edwards-Anderson model. Both results are explained in a unified manner by means of the droplet picture. In particular, the cusp-like behavior of the FCM is interpreted as evidence, not for an equilibrium phase transition under a finite magnetic field, but for a dynamical ('blocking') transition frequently observed in glassy systems.
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