The European Physical Journal D

, Volume 45, Issue 3, pp 535–537 | Cite as

Superparamagnetism in small Fe clusters on Cu(111)

Magnetism

Abstract.

Fe clusters of 105±2 atoms/cluster were mass selectively deposited onto Cu(111) at cryogenic temperatures. XMCD was used to measure temperature and direction dependent magnetization curves. The clusters are superparamagnetic at the lowest temperature measured (10 K). Their magnetization curves are consistent with magnetic moments of ≈2.5μB per atom which are thus enhanced over the bulk values. Within experimental accuracy, the clusters do not present magnetocrystalline anisotropy in the temperature range of 10 K to 60 K.

PACS.

36.40.Cg Electronic and magnetic properties of clusters 36.20.Kd Electronic structure and spectra 73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals 75.75.+a Magnetic properties of nanostructures 78.67.Bf Nanocrystals and nanoparticles 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  1. 1.Max-Planck-Instut für Metallforschung, Heisenbergstr. 3StuttgartGermany

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