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

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

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
Volume45
Issue number3
DOIs
Publication statusPublished - Jun 2005

Keywords

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

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