Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 20, Pages 4676-4679Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.4676
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Using a new micro-SQUID setup, we investigate magnetic anisotropy in a single 1000-atom cobalt cluster This system opens new fields in the characterization and 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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