Unambiguous signature of exchange interactions between nanoparticles in a collective system
C. A. Iglesias,
J. C. R. de Araújo,
J. Xavier
et al.
Abstract:We report a simple, efficient manner to assess magnetic interactions, more specifically the exchange interaction, in systems as blocked magnetic nanoparticles. Specifically, we investigate what is the theoretical limit for the external magnetic susceptibility in a system described by the plain old Stoner-Wohlfarth model. We go beyond and introduce a general mean field theory for interacting systems, thus estimating how the magnetic susceptibility is affected due to the dipolar and exchange interactions inside … Show more
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