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