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Mean Magnetic Moment of Polydisperse Superparamagnetic Nanoparticles: Correlation Between Grain Size and Magnetic Moment Distributions

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Abstract:

The field dependence of magnetization in superparamagnetic systems can be fitted using a set of Langevin contributions characterized by their particle densities and their magnetic moments. In fact, these contributions are just partial average values over the actual magnetic moment distribution of the system. The achievement of the most adequate mean magnetic moment is non-trivial and depends on the characteristics of the moment distribution and the applied magnetic field range. As an example, results have been applied to a nanocrystalline alloy.

Keywords: NANOCRYSTALLINE ALLOYS; NANOCRYSTALLINE MICROSTRUCTURE; SOFT MAGNETS; SUPERPARAMAGNETISM

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2007.407

Publication date: 2007-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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