First order approximation for interactions in particulate single-domain particle systems

Abstract

In most cases the interparticle interactions are essential in the evaluation of the magnetic properties of the ferromagnetic particulate systems. Usually, in first approximation, a mean interaction field linearly dependent on the magnetic moment of the sample is considered and other interactions are neglected. Using micromagnetic simulations on a system of interacting uniaxial single-domain particles we have shown that both the mean interaction field and interaction fields distribution dispersion depend on the magnetic moment of the sample. When the magnetic moment of the sample is small the statistical interactions are more important than the mean field ones and cannot be neglected.