MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Morphology and Magnetic Properties of Fe and Al Nanocomposites Prepared with Single and Double-Glow-Discharge Sources
Ryoji KatohKohei NonakaKenji SumiyamaDong-Liang PengTakehiko Hihara
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2008 Volume 49 Issue 8 Pages 1830-1835

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Abstract

Fe and Al nanocomposites have been prepared using the plasma-gas-condensation cluster deposition system and investigated by transmission electron microscope and magnetization measurements. In Fe-Al alloy clusters assemblies prepared with the single glow discharge source there are bcc Fe-Al and B2-type ordered FeAl phases. In Fe/Al cluster composites prepared with double glow discharge sources, core-shell clusters are obtained: Fe cores are covered by Al and/or Al-oxide crystallites. In magnetization curves of the Fe-Al alloy cluster assembly and Fe/Al cluster composite, magnetic coercivity values are much smaller than that of an Fe cluster assembly. These results indicate that Fe-rich ferromagnetic Fe-Al phases exist in the Fe-Al alloy cluster assembly and Fe cores are covered and their magnetic coupling are weakened by Al and/or Al-oxide layers in the Fe/Al cluster composite.

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© 2008 The Japan Institute of Metals and Materials
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