Magnetic Interactions Effects on Magnetic Measurements for Nanoparticle Assemblies

被引：7

作者：

Hillion, Arnaud ^{[1
]}

Tamion, Alexandre ^{[1
]}

Tournus, Florent ^{[1
]}

Flament, Jean-Baptiste ^{[1
]}

Hillenkamp, Matthias ^{[2
]}

Bonet, Edgar ^{[3
,4
]}

Dupuis, Veronique ^{[1
]}

机构：

[1] Univ Lyon 1, LPMCN, CNRS, UMR 5586, F-69622 Villeurbanne, France

[2] Univ Lyon 1, LASIM, CNRS, UMR 5579, F-69622 Villeurbanne, France

[3] CNRS, Inst Neel, F-38042 Grenoble, France

[4] Univ Grenoble 1, F-38042 Grenoble, France

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期

关键词：

Cobalt nanoparticles; magnetic anisotropy; magnetic interactions; magnetic nanoparticles; m(ZFC); MODELS;

D O I：

10.1109/TMAG.2011.2155048

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report on the magnetic properties of 3 nm cobalt clusters embedded in gold matrix using magnetic investigations. From the analysis of the m(FC), m(ZFC) and m(H) curves, we determine precisely the Co magnetic diameter Probability Density Function (PDF) in highly diluted samples. We show that even with a 3% vol. concentrations of magnetic particles, the interactions between particles must necessarily be taken into account. For this purpose, we first determine the individual properties of particles in highly diluted samples (1%vol.). In a second step, we increase the concentration in order to retrieve the magnetic interactions signature. Exchange like interactions can be modeled by the formation of magnetic dimers, thus modifying the PDF.

引用

页码：3154 / 3156

页数：3

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