Magnetic properties and Mössbauer spectra of nanosized CoFe2O4 powders

M. Grigorova, H. J. Blythe, V. Blaskov, V. Rusanov, V. Petkov, V. Masheva, D. Nihtianova, Ll M. Martinez, J. S. Muñoz, M. Mikhov

Research output: Contribution to journalArticlepeer-review

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Abstract

CoFe2O4 fine powders with particle sizes between 43 Å (4.3 nm) and 465 Å (46.5 nm) were produced by a method of 'gentle' chemistry. It was found that a surface layer with thickness of about 10 Å does not contribute to the magnetization in the fields used. Maximum coercivity of 14 kOe and reduced remanence of 0.64 were measured at 5 K after magnetization in 50 kOe indicating a cubic-type magnetocrystalline anisotropy.

Original languageEnglish
Pages (from-to)163-172
Number of pages10
JournalJournal of Magnetism and Magnetic Materials
Volume183
Issue number1-2
DOIs
StatePublished - Mar 7 1998

Keywords

  • Anisotropy - multi-axial
  • Ferrite
  • Fine particles
  • Superparamagnetism

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