Monte Carlo simulations are performed to study the magnetization properties of a cluster of nanosized magnetic particles in a non-magnetic matrix. The dipolar interaction between monodomain particles is considered. To enhance convergence, the orientations of the magnetic moments are confined to a number of equally distributed fixed directions. The results show that the dipole-dipole interaction alone does not account for the experimentally observed characteristics of such systems. (C) 2003 Elsevier B.V. All rights reserved. [References: 4]
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