Magnetic Anisotropy of a Single Cobalt Nanoparticle

Details Magnetic Anisotropy of a Single Cobalt Nanoparticle Magnetic Anisotropy of a Single Cobalt Nanoparticle

2000-12-03

arxiv.org/abs/cond-mat/0012029v1

Phys. Rev. Lett 86, 4676 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 8 figures

Scientific paper

10.1103/PhysRevLett.86.4676

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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