Magnetic nanoscale aggregates of cobalt and nickel in MgO single crystals

Joana Vaz Pinto, Maria Margarida Cruz, Rui Manuel Coelho da Silva, Eduardo Jorge Alves, Roberto Gonzalez González, Maria Margarida Godinho

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15 Citations (Scopus)


The magnetic properties of Co and Ni nanosized aggregates formed after implantation of nickel and cobalt ions in magnesium oxide single crystals were investigated. The influence of the implantation energy and annealing treatments was characterized. The particle size distribution was determined from the combined analysis of the magnetic moment dependence on both magnetic field and temperature, and used to determine the magnetic anisotropy constant of the aggregates. The results for nickel aggregates indicate the presence of an antiferromagnetic layer after the annealing treatments.
Original languageEnglish
Pages (from-to)331-338
JournalEuropean Physical Journal B
Issue number3
Publication statusPublished - Jun 2005


  • Aggregates
  • Annealing
  • Cobalt
  • Doping (additives)
  • Ferromagnetic materials
  • Impurities
  • Nanostructured materials
  • Nickel


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