Synthesis of size-controlled cobalt ferrite particles with high coercivity and squareness ratio

C. N. Chinnasamy, M. Senoue, B. Jeyadevan, Oscar Perales-Perez, Kozo Shinoda, Kazuyuki Tohji

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 nm were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe3+ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (Ms) of 64 emu/g and a maximum coercivity (Hc) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53.

Original languageEnglish
Pages (from-to)80-83
Number of pages4
JournalJournal of Colloid And Interface Science
Volume263
Issue number1
DOIs
Publication statusPublished - 2003 Jul 1

Keywords

  • Cobalt ferrite
  • Colloids
  • Coprecipitation
  • Ferrous oxidation by nitrate
  • Magnetic characterization
  • Nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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