Abstract
We describe a mean-field theory applicable to nanostructured systems of single-domain magnetic particles. This theory provides expressions for the experimental determination of the easy-axis distribution and the interaction strength at remanence from measurements of the angular dependence of the maximum remanences parallel and perpendicular to the applied field. We have applied the model to barium ferrite tapes providing a suitable quantitative explanation for the difference experimentally observed between remanences, which could not be explained until now. The magnetocrystalline anisotropy strength of the nanoparticle is also determined. The values of the distribution function, the interaction parameter, and the magnetocrystalline anisotropy predicted by our model are in agreement with the results obtained by other methods.
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