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

Carla Cannas, Maria F. Casula, Giorgio Concas, Anna Corrias, Dante Gatteschi, Andrea Falqui, Anna Musinu, Claudio Sangregorio, Giorgio Spano

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

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, 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.

Original languageEnglish (US)
Pages (from-to)3180-3187
Number of pages8
JournalJournal of Materials Chemistry
Volume11
Issue number12
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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