Abstract
In this work we use the spreading of damage technique to study the dynamical properties 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 ? = J0/Jd, the ground state of the model corresponds to ferromagnetic stripes whose width increases with ?. 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 spreading of damage technique allows one to identify two dynamical phases, with a behaviour similar to that observed in the Sherrington-Kirkpatrick model of spin glasses.
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