Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems (Articolo in rivista)

Type
Label
  • Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4771993 (literal)
Alternative label
  • Elin L. Winkler, Enio Lima, Jr., Dina Tobia, Martín E. Saleta, Horacio E. Troiani, Elisabetta Agostinelli, Dino Fiorani, Roberto D. Zysler (2012)
    Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems
    in Applied physics letters (Online); American Institute of Physics, Woodbury [NY] (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Elin L. Winkler, Enio Lima, Jr., Dina Tobia, Martín E. Saleta, Horacio E. Troiani, Elisabetta Agostinelli, Dino Fiorani, Roberto D. Zysler (literal)
Pagina inizio
  • 252405 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 101 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 25 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Centro Atómico Bariloche, CNEA-CONICET, 8400 S.C. de Bariloche, Río Negro, Argentina Argentine-Italian Joint Laboratory of Nanomagnetism, LIANAM, Laboratorio Resonancias Magnéticas, CNEA, Argentine/Istituto di Struttura della Materia, CNR, Italy Istituto di Struttura della Materia, CNR, Area della Ricerca di Roma, C.P. 10, I-00016 Monterotondo Staz., Rome, Italy (literal)
Titolo
  • Origin of magnetic anisotropy in ZnO/CoFe2O4 and CoO/CoFe2O4 core/shell nanoparticle systems (literal)
Abstract
  • ZnO-core/CoFe2O4-shell nanoparticles of 7.4 nm average size have been synthesized and their magnetic properties have been compared to those of CoO-core/CoFe2O4-shell nanoparticles with similar morphology. The coercive field values are much lower than those for CoO/CoFe2O4 nanoparticles (e.g., at 5 K: Hc = 7.8 kOe for ZnO/CoFe2O4; Hc = 27.8 kOe for CoO/CoFe2O4). The nature of the coercive field values is explained by a phenomenological model for the free energy of a non-magnetic core, or an antiferromagnetic core, encapsulated by a hard ferrimagnetic shell. (literal)
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