title: Magnetic anisotropy of a single cobalt nanocluster.
abstract: 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.
authors.affiliation: DPM-Université Claude Bernard-Lyon 1 et CNRS, 69622 Villeurbanne, France.
authors.forename: M
authors.initials: M
authors.lastname: Jamet
authors.forename: W
authors.initials: W
authors.lastname: Wernsdorfer
authors.forename: C
authors.initials: C
authors.lastname: Thirion
authors.forename: D
authors.initials: D
authors.lastname: Mailly
authors.forename: V
authors.initials: V
authors.lastname: Dupuis
authors.forename: P
authors.initials: P
authors.lastname: Mélinon
authors.forename: A
authors.initials: A
authors.lastname: Pérez