Magnetic properties of nanocrystalline CoFe2O4 dispersed in amorphous silica (Articolo in rivista)

Type
Label
  • Magnetic properties of nanocrystalline CoFe2O4 dispersed in amorphous silica (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Alternative label
  • Congiu F., Concas G., Ennas G., Falqui A., Fiorani D., Marongiu G., Marras S., Spano G., Testa A. M. (2004)
    Magnetic properties of nanocrystalline CoFe2O4 dispersed in amorphous silica
    in Journal of magnetism and magnetic materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Congiu F., Concas G., Ennas G., Falqui A., Fiorani D., Marongiu G., Marras S., Spano G., Testa A. M. (literal)
Pagina inizio
  • 1561 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 272 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Cagliari, Dipartimento Sci Chim, I-09042 Monserrato, CA Italy INFM, I-09042 Monserrato, CA Italy CNR, ISM, Area Ric, I-00016 Monterotondo, Italy (literal)
Titolo
  • Magnetic properties of nanocrystalline CoFe2O4 dispersed in amorphous silica (literal)
Abstract
  • Almost spherical CoFe2O4 nanocrystals with a narrow size distribution centered around 2.5(5)nm, uniformly dispersed in an amorphous SiO2 matrix have been prepared by high energy ball milling followed by thermal treatment at 900°C. Mössbauer spectra show the presence of CoFe2O4 nanoparticles in the superparamagnetic state at 293K and mainly in the blocked state at 77K. This is confirmed by ZFC/FC measurements giving evidence of a distribution of blocking temperatures, centered at 50K. (literal)
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