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Issue 12, 2001
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Magnetic properties of γ-Fe2O3–SiO2 aerogel and xerogel nanocomposite materials

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Abstract

The properties of aerogel and xerogel iron oxidesilica nanocomposites prepared by the sol–gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mössbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.

Graphical abstract: Magnetic properties of γ-Fe2O3–SiO2 aerogel and xerogel nanocomposite materials

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Publication details

The article was received on 23 May 2001, accepted on 14 Aug 2001 and first published on 09 Oct 2001


Article type: Paper
DOI: 10.1039/B104562H
J. Mater. Chem., 2001,11, 3180-3187

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    Magnetic properties of γ-Fe2O3–SiO2 aerogel and xerogel nanocomposite materials

    C. Cannas, M. F. Casula, G. Concas, A. Corrias, D. Gatteschi, A. Falqui, A. Musinu, C. Sangregorio and G. Spano, J. Mater. Chem., 2001, 11, 3180
    DOI: 10.1039/B104562H

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