J. Phys. I France
Volume 3, Numéro 4, April 1993
Page(s) 969 - 985
DOI: 10.1051/jp1:1993178
J. Phys. I France 3 (1993) 969-985

The remanent magnetization in Spin-Glass models

Giorgio Parisi1 and Félix Ritort1, 2

1  Dipartimento di Fisica, Università di Roma II, " Tor Vergata ", and INFN, Sezione di Roma, " Tor Vergata ", Via della Ricerca Scientifica, Roma 00133, Italy
2  Departament de Física Fondamental, Universitat de Barcelona, Diagonal 648, 08028 Barcelona, Spain

(Received 3 August 1992, accepted in final form 1 December 1992)

In this work we study the remanent magnetization in various spin glass models after the removing of a strong magnetic field. We compare the behavior of the remanent magnetization of infinite-range models and of more realistic short-range models. In both cases we find a reasonable agreement with a simple phenomenological law at low temperatures, especially in the case of continuously distributed exchange interactions. The relaxation of the internal energy shows a more complex behavior.


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