The effects of magnetostatic interactions between monodisperse single-domain nanoparticles are described in terms of the particle concentration and structural ordering within the assembly. The resulting energy level distribution, time-dependent behaviour and spatial correlations are discussed in the context of the properties of bulk dipolar ferromagnets, bulk spin glasses and non-interacting monodomain particles. Both standard measurements and novel characterization techniques are described. The results from research groups studying monodisperse magnetic nanoparticles are compared to illustrate the distinguishing characteristics of interacting assemblies and to highlight important questions that remain.
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Majetich et al. (2006) studied this question.
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