The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mossbauer 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.

Magnetic Properties of g-Fe2O3-SiO2 Aerogel and Xerogel Nanocomposite Materials

CANNAS, CARLA;CASULA, MARIA FRANCESCA;CONCAS, GIORGIO;CORRIAS, ANNA;FALQUI, ANDREA;MUSINU, ANNA MARIA GIOVANNA;
2001-01-01

Abstract

The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mossbauer 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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/103709
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