Magnetostatic fields in planar assemblies of magnetic nanoparticles

Ignatchenko, V. A.; Édelman, I. S.; Petrov, D. A.

doi:10.1103/physrevb.81.054419

Cited by 15 publications

(10 citation statements)

References 24 publications

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“…The obtained magnetic characteristics could be due to the effect of the interparticle interactions and their non-uniform distribution. 19,46 It is also interesting to mention that even at 5K, the magnetization curves do not saturate and the maximum magnetization (∼130 kA/m) value is appreciably smaller than the one expected for bulk magnetite (∼480 kA/m). This can be understood by taking into account again the small size of the MNPs and the high amount of atoms on the surface, as discussed before (Fig.…”

Section: Zfc-fcmentioning

confidence: 99%

“…10 Such a result would be not possible without enormous efforts in the development of fabrication, [11][12][13][14] characterization techniques 15,16 and basic theory in the magnetism of the fine particles 17,18 and assemblies of ferromagnetic nanoparticles. 19 There are different physical and chemical methods for fabrication of the oxide MNPs: hydrothermal synthesis, 11 microemulsion, 12 chemical co-precipitation, 16,20 oxidation of Fe(OH) 2 , 21 heating the material with different types of irradiation, 22 autocombustion, 4 and biomioneralization 23 etc. Despite the advantages of traditional chemical techniques for the iron oxide synthesis there are well known disadvantages, such as low production rates, limited purity or a high environmental cost of the final product, clear deviations from the sphericity, and wide size distributions, etc.…”

Section: Introductionmentioning

confidence: 99%

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Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids

et al. 2012

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Nanoparticles of iron oxides (MNPs) were prepared using the electric explosion of wire technique (EEW). The main focus was on the fabrication of de-aggregated spherical nanoparticles with a narrow size distribution. According to XRD the major crystalline phase was magnetite with an average diameter of MNPs, depending on the fraction. Further separation of air-dry EEW nanoparticles was performed in aqueous suspensions. In order to provide the stability of magnetite suspension in water, we found the optimum concentration of the electrostatic stabilizer (sodium citrate and optimum pH level) based on zeta-potential measurements. The stable suspensions still contained a substantial fraction of aggregates which were disintegrated by the excessive ultrasound treatment. The separation of the large particles out of the suspension was performed by centrifuging. The structural features, magnetic properties and microwave absorption of MNPs and their aqueous solutions confirm that we were able to obtain an ensemble in which the magnetic contributions come from the spherical MNPs. The particle size distribution in fractionated samples was narrow and they showed a similar behaviour to that expected of the superparamagnetic ensemble. Maximum obtained concentration was as high as 5 % of magnetic material (by weight). Designed assembly of de-aggregated nanoparticles is an example of on-purpose developed magnetic nanofluid

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Section: Zfc-fcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Iron oxide nanoparticles fabricated by electric explosion of wire: focus on magnetic nanofluids

et al. 2012

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“…More recent discussions on magnetostatic fields in arrays can be found in Refs. [12,22,23]. However, all these publications consider the whole array.…”

Section: Magnetostatic Fields In the Arraymentioning

confidence: 94%

Array anisotropy in structured thin film arrays: Influence on the magnetodynamics

Wolf

Patschureck

Schäfer

et al. 2011

Journal of Magnetism and Magnetic Materials

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“…We would like also mention the works, where the magnetostatic interaction in assemblies of magnetic nanoparticles was studied [13,14], and the problem of the oscillatory modes in a pair of coaxial magnetostatically interacting nanodisks was analytically solved [15].…”

Section: Introductionmentioning

confidence: 99%