Spreading of damage in a two-dimensional Ising model with dipolar interactions

PABLO GLEISER; FRANCISCO TAMARIT

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL

IOP PUBLISHING LTD

Lugar: Londres; Año: 2000 vol. 32 p. 1 - 8

1751-8113

In this work we use the spreading of damage technique to study the dynamicalproperties of a two-dimensional Ising model with competition between ferromagnetic exchange (J0) and antiferromagnetic dipolar (Jd) interactions. In recent works it was shown that, depending on the ratio δ = J0/Jd, the ground state of the model corresponds to ferromagnetic stripes whose width increases with δ. In this striped phase the system displays a slow dynamics, characterized by the formation and growth of magnetic domains. We found that, within these phases, the spreadingof damage technique allows one to identify two dynamical phases, with a behaviour similar to that observed in the Sherrington?Kirkpatrick model of spin glasses.