Numerical micromagnetics of interacting superparamagnetic nanoparticles assembled in clusters with different dimensionalities

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DOIResolve DOI: http://doi.org/10.1016/j.jmmm.2007.02.055
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TypeArticle
Journal titleJournal of Magnetism and Magnetic Materials
Volume314
Issue1
Pages1115; # of pages: 5
SubjectSuperparamagnetic nanoparticles; Magnetostatic interactions; Numerical micromagnetics; Superparamagnetic clusters; Magnetic manipulation
AbstractWe analyze here the equilibrium magnetization state of densely packed interacting superparamagnetic nanoparticles assembled in clusters of various sizes and dimensionalities by comparison with the non-interacting case. We demonstrate that the average magnetization of individual particles is strongly increased in linear chains aligned parallel with the external magnetic field. Twodimensional (2D) distributions of superparamagnetic nanoparticles present weaker increases of their average magnetization with respect to the non-interacting approximation whereas volume distributions (3D) are almost equivalent with the non-interacting case. A large number of nanoparticles densely packed in 2D superparamagnetic clusters present almost the same magnetic moment as infinite superparamagnetic chains. The effect of mutual interactions on the total magnetic moment of 3D surfaces (spheroids with various aspect ratios) uniformly covered with densely packed monolayers of superparamagnetic nanoparticles is also investigated.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number49415
NPARC number15826008
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Record identifier71e2de24-460c-4fa9-8e09-11356e6a2458
Record created2010-07-19
Record modified2016-05-09
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