Magnetic Anisotropy of a Single Cobalt Nanocluster
Matthieu Jamet,Wolfgang Wernsdorfer,C. Thirion,Dominique Mailly,Véronique Dupuis,Patrice Mélinon,Alain Perez +6 more
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TLDR
Three-dimensional switching field measurements performed on a 3 nm cobalt cluster embedded in a niobium matrix are reported, able to separate the different magnetic anisotropy contributions and evidence the dominating role of the cluster surface.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.read more
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Magnetization Reversal Across Multiple Serial Barriers in a Single Fe$_3$O$_4$ Nanoparticle
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