Exchange bias in Co nanoparticles embedded in an Mn matrix (Articolo in rivista)

Type
Label
  • Exchange bias in Co nanoparticles embedded in an Mn matrix (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Domingo N., Testa A. M., Fiorani D., Binns C., Baker S., Tejada J. (2007)
    Exchange bias in Co nanoparticles embedded in an Mn matrix
    in Journal of magnetism and magnetic materials
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Domingo N., Testa A. M., Fiorani D., Binns C., Baker S., Tejada J. (literal)
Pagina inizio
  • 155 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 316 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISM - CNR Dept. Física Fonamental, Universitat de Barcelona, Barcelona, Spain Department of Physics and Astronomy, University of Leicester, Leicester, UK (literal)
Titolo
  • Exchange bias in Co nanoparticles embedded in an Mn matrix (literal)
Abstract
  • Magnetic properties of Co nanoparticles of 1.8 nm diameter embedded in Mn and Ag matrices have been studied as a function of the volume fraction (VFF). While the Co nanoparticles in the Ag matrix show superparamagnetic behavior with TB=9.5 K (1.5% VFF) and TB=18.5 K (8.9% VFF), the Co nanoparticles in the antiferromagnetic Mn matrix show a transition peak at 65 K in the ZFC/FC susceptibility measurements, and an increase of the coercive fields at low temperature with respect to the Ag matrix. Exchange bias due to the interface exchange coupling between Co particles and the antiferromagnetic Mn matrix has also been studied. The exchange bias field (Heb), observed for all Co/Mn samples below 40 K, decreases with decreasing volume fraction and with increasing temperature and depends on the field of cooling (Hfc). Exchange bias is accompanied by an increase of coercivity. (literal)
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