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Magnetic Anisotropy of a Single Cobalt Nanoparticle

M. Jamet·W. Wernsdorfer·C. Thirion·D. Mailly·V. Dupuis·P. Melinon·A. Perez
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Abstract

Using a new microSQUID set-up, we investigate magnetic anisotropy in a single 1000-atoms cobalt cluster. This system opens new fields in the characterization and the understanding of the origin of magnetic anisotropy in such nanoparticles. For this purpose, we report three-dimensional switching field measurements performed on a 3 nm cobalt cluster embedded in a niobium matrix. We are able to separate the different magnetic anisotropy contributions and evidence the dominating role of the cluster surface.

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M. Jamet, W. Wernsdorfer, C. Thirion, D. Mailly, V. Dupuis, P. Melinon, A. Perez. 2000-12-03. Magnetic Anisotropy of a Single Cobalt Nanoparticle. https://doi.org/10.1103/physrevlett.86.4676

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