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High anisotropy Sm–Co nanoparticles: Preparation by cluster gun technique and their magnetic properties

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6 Author(s)
Stoyanov, S. ; Department of Physics and Astronomy, University of Delaware, Delaware 19716 ; Skumryev, V. ; Zhang, Y. ; Huang, Y.
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Sm–Co nanoparticles with 7 nm mean diameter have been obtained by gas condensation in a cluster gun. By absorbing light from quartz halogen bulbs, the nanoparticles are annealed during their flight from the cluster gun to the substrate and are embedded in a carbon matrix by cosputtering. This in situ annealing results in nanoparticles with moderate coercivity. The moderate coercivity and its strong temperature dependence imply a strong effect of the thermal fluctuations, which can be partly overcome by embedding the nanoparticles in an antiferromagnetic matrix (CoO) rather than in a paramagnetic C. © 2003 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:93 ,  Issue: 10 )

Date of Publication:

May 2003

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