Spin-glass-like freezing and enhanced magnetization in ultra-small CoFe2O4 nanoparticles (Articolo in rivista)

Type
Label
  • Spin-glass-like freezing and enhanced magnetization in ultra-small CoFe2O4 nanoparticles (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/0957-4484/21/12 (literal)
Alternative label
  • Peddis D. (1,2,3), Cannas C. (2), Piccaluga G. (2), Agostinelli E. (1), Fiorani D. (1) (2010)
    Spin-glass-like freezing and enhanced magnetization in ultra-small CoFe2O4 nanoparticles
    in Nanotechnology (Bristol. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Peddis D. (1,2,3), Cannas C. (2), Piccaluga G. (2), Agostinelli E. (1), Fiorani D. (1) (literal)
Pagina inizio
  • 125705 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 21 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • http://dx.doi.org/10.1088/0957-4484/21/12/125705 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 10 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) CNR--Istituto di Struttura della Materia, PO 10, 00016 Monterotondo Stazione, (RM), Italy; 2) Dipartimento di Scienze Chimiche, Universit` a di Cagliari, SS554, Bivio per Sestu, 09042 Monserrato (CA), Italy; (literal)
Titolo
  • Spin-glass-like freezing and enhanced magnetization in ultra-small CoFe2O4 nanoparticles (literal)
Abstract
  • The magnetic properties of ultra-small (3 nm) CoFe2O4 nanoparticles have been investigated by DC magnetization measurements as a function of temperature and magnetic field. The main features of the magnetic behaviour are blocking of non-interacting particle moments (zero-field-cooled magnetization TmaxH40 K), a rapid increase of saturation magnetization (up to values higher than for the bulk material) at low T and an increase in anisotropy below 30 K due to the appearance of exchange bias. The low temperature behaviour is determined by a random freezing of surface spins. Localized spin-canting and cation distribution between the two sublattices of the spinel structure account quantitatively for the observed increase in saturation magnetization. (literal)
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