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Magnetic Properties of Nanosize Iron Clusters

Published online by Cambridge University Press:  15 February 2011

E. L. Venturini ,
J. P. Wilcoxon  and
P. P. Newcomer
E. L. Venturini
Affiliation:
Sandia National Laboratories, MS 0345, Albuquerque, NM 87185-0345
J. P. Wilcoxon
Affiliation:
Sandia National Laboratories, MS 0345, Albuquerque, NM 87185-0345
P. P. Newcomer
Affiliation:
Sandia National Laboratories, MS 0345, Albuquerque, NM 87185-0345
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Abstract

Isolated, monodisperse α-Fe clusters between 1.4 and 15 nm in diameter were prepared inside inverse micelles using an oil-continuous, nonaqueous system. The magnetic properties of these clusters were studied in a SQUID magnetometer as a function of cluster size, temperature and applied magnetic field. The blocking temperature, coercive field and remanent moment of 12.5 nm Fe clusters in inverse micelles are significantly lower than those reported for clusters of similar α-Fe core size but with a surface oxide. The novel synthesis technique may yield metallic clusters with essentially intrinsic magnetic properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 351: Symposium V – Molecularly Designed Ultrafine/Nanostructured Materials , 1994 , 311
Copyright
Copyright © Materials Research Society 1994

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References

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