Measuring magnetic correlations in nanoparticle assemblies

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We illustrate how to extract correlations between magnetic moments in assemblies of nanoparticles from, e.g., electron holography data providing the combined knowledge of particle size distribution, inter-particle distances, and magnitude and orientation of each magnetic moment within a nanoparticle superstructure, We show, based on simulated data, how to build a radial/angular pair distribution function f(r,θ) encoding the spatial and angular difference between every pair of magnetic moments. A scatter-plot of f(r,θ) reveals the degree of structural and magnetic order present, and hence provides a measure of the strength and range of magnetic correlations.
Original languageEnglish
Book seriesJournal of Physics: Conference Series (Online)
Pages (from-to)012009
Number of pages5
Publication statusPublished - 2014

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