Effect of dipolar interaction observed in iron-based nanoparticles
TLDR
In this article, spherical magnetic nanoparticles with narrow size distribution and organic capping were diluted in paraffin with different concentrations to verify the role of dipolar interactions on the macroscopic magnetic behavior.Abstract:
Spherical magnetic nanoparticles with narrow size distribution and organic capping were diluted in paraffin with different concentrations to verify the role of dipolar interactions on the macroscopic magnetic behavior. Increasing concentration of magnetic nanoparticles leads to higher blocking temperatures. The experimental data were analyzed by means of a recently proposed model that takes into account magnetic interactions of dipolar origin, and an excellent agreement was found. Considering the magnetic interaction among particles it was possible to obtain the real magnetic moment and estimate structural parameters that are consistent with the ones obtained by small angle x-ray scattering and transmission electron microscopy.read more
Citations
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Photo-fluorescent and magnetic properties of iron oxide nanoparticles for biomedical applications
TL;DR: This review article reports on some of the most recent experimental and theoretical studies on magnetic heating mechanisms under an alternating (AC) magnetic field and reports on the recently discovered photoluminescence of Fe3O4 and explains the emission mechanisms in terms of the electronic band structures.
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Role of dipole-dipole interactions for hyperthermia heating of magnetic nanoparticle ensembles
Christian Haase,Ulrich Nowak +1 more
TL;DR: In this article, the effects of dipole-dipole interparticle interactions on the heating power of magnetic nanoparticles were studied numerically with a focus on the effect of dipoles-dipsoles interactions.
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Collective dipolar interactions in self-assembled magnetic binary nanocrystal superlattice membranes.
TL;DR: The growth and magnetic characterization of large-area BNSL membranes self-assembled from distinct magnetic NCs at the liquid-air interface are reported, which exhibit a single-phase-like magnetization alignment process, which is not observed in the phase-separated NC mixtures having the same stoichiometry.
Journal ArticleDOI
Specific Absorption Rates and Magnetic Properties of Ferrofluids with Interaction Effects at Low Concentrations
TL;DR: In this article, the specific absorption rate (SAR) of a maghemite-based ferrofluid, measured at 315 K, 3 kA/m, and 109 kHz, was found to double as the concentration of the magnetite was decreased by a factor of 4.
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Effect of Nanoclustering and Dipolar Interactions in Heat Generation for Magnetic Hyperthermia.
D. F. Coral,Pedro Mendoza Zélis,Marzia Marciello,María del Puerto Morales,Aldo F. Craievich,F. H. Sánchez,Marcela Beatriz Fernández van Raap +6 more
TL;DR: It is proved that the magnetic hyperthermia performances of nanoclusters and single nanoparticles are distinctive and the power dissipated by an ensemble of dispersed magnetic nanoparticles becomes a nonextensive property as a direct consequence of the long-range nature of dipolar interactions.
References
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Xavier Batlle,Amílcar Labarta +1 more
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Particle Size Dependence of Coercivity and Remanence of Single‐Domain Particles
E. F. Kneller,F. E. Luborsky +1 more
TL;DR: In this paper, the coercive force and remanence of essentially spherical iron and iron-cobalt alloy particles with diameters from 20 to 3000 A have been measured at 4°, 76°, and 207°K and compared to the theoretically predicted behavior.
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A dynamic study of small interacting particles: superparamagnetic model and spin-glass laws
TL;DR: In this article, a superparamagnetic model was proposed to explain the properties of a system constituted by small interacting particles (iron grains dispersed in an amorphous alumina matrix), including interparticle interactions, which implies a transition at a temperature of 0 K.