Magnetic properties of iron oxide nanoparticles prepared by seeded-growth route (Articolo in rivista)

Type
Label
  • Magnetic properties of iron oxide nanoparticles prepared by seeded-growth route (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1007/s11051-013-1514-8 (literal)
Alternative label
  • Espinosa A. [ 1 ] ; Munoz-Noval A. [ 2,3 ] ; Garcia-Hernandez M. [ 1 ] ; Serrano A. [ 2 ] ; de la Morena J. J. [ 1,2 ] ; Figuerola A. [ 4,5 ] ; Quarta A. [ 6 ] ; Pellegrino T. [ 6,7 ] ; Wilhelm C. [ 8,9 ] ; Garcia M. A. [ 2 ] (2013)
    Magnetic properties of iron oxide nanoparticles prepared by seeded-growth route
    in Journal of nanoparticle research
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Espinosa A. [ 1 ] ; Munoz-Noval A. [ 2,3 ] ; Garcia-Hernandez M. [ 1 ] ; Serrano A. [ 2 ] ; de la Morena J. J. [ 1,2 ] ; Figuerola A. [ 4,5 ] ; Quarta A. [ 6 ] ; Pellegrino T. [ 6,7 ] ; Wilhelm C. [ 8,9 ] ; Garcia M. A. [ 2 ] (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 15 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] CSIC, ICMM, Madrid 28049, Spain [ 2 ] CSIC, ICV, E-28049 Madrid, Spain [ 3 ] ESRF, SpLine Spanish CRG Beamline, F-38043 Grenoble 09, France [ 4 ] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain [ 5 ] Univ Barcelona, Inst Nanociencia & Nanotecnol, E-08028 Barcelona, Spain [ 6 ] CNR NANO, Natl Nanotechnol Lab, I-73100 Lecce, Italy [ 7 ] Ist Italiano Tecnol, I-16163 Genoa, Italy [ 8 ] CNRS, UMR 7057, Lab Mat & Syst Complexes MSC, F-75205 Paris 13, France [ 9 ] Univ Paris Diderot, F-75205 Paris 13, France (literal)
Titolo
  • Magnetic properties of iron oxide nanoparticles prepared by seeded-growth route (literal)
Abstract
  • In this work we investigate the magnetic properties of iron oxide nanoparticles obtained by two-step synthesis (seeded-growth route) with sizes that range from 6 to 18 nm. The initial seeds result monocrystalline and exhibit ferromagnetic behavior with low saturation field. The subsequent growth of a shell enhances the anisotropy inducing magnetic frustration, and, consequently, reducing its magnetization. This increase in anisotropy occurs suddenly at a certain size (similar to 10 nm). Electronic and structural analysis with X-ray absorption spectroscopy indicates a step reduction in the oxidation state as the particle reaches 10 nm size while keeping its overall structure in spite of the magnetic polydispersity. The formation of antiphase magnetic boundaries due to island percolation in the growing shells is hypothesized to be the mechanism responsible of the magnetic behavior, as a direct consequence of the two-step synthesis route of the nanoparticles. (literal)
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