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Study of reversible and irreversible magnetization processes of coprecipitated cobalt ferrite

Medina-Boudri, A. ; Bueno-Baqués, D. ; Fuentes-Cobas, L. ; Miki-Yoshida, M. ; Matutes-Aquino, J.

Journal of Applied Physics, 01 May 2000, Vol.87(9), pp.6235-6237 [Periódico revisado por pares]

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  • Título:
    Study of reversible and irreversible magnetization processes of coprecipitated cobalt ferrite
  • Autor: Medina-Boudri, A. ; Bueno-Baqués, D. ; Fuentes-Cobas, L. ; Miki-Yoshida, M. ; Matutes-Aquino, J.
  • Assuntos: Ferrites II
  • É parte de: Journal of Applied Physics, 01 May 2000, Vol.87(9), pp.6235-6237
  • Descrição: Cobalt ferrite was obtained by coprecipitation of iron and cobalt sulphates into acetone medium. The Co 0.6 2+ Fe 0.4 3+ [Co 0.4 2+ Fe 1.6 3+ ]O 4 cation distribution was obtained from Mössbauer spectroscopy at room temperature. Saturation magnetization of 74.1 emu/g and an intrinsic coercive field of 528 Oe were measured using a vibrating sample magnetometer. Using the moving Preisach model, separation of reversible (M rev ) and irreversible (M irr ) magnetization components was performed. The parameters η defined as η=(dM rev /dM irr ) H i and k m the moving Preisach parameter expressed through the relation η=k m χ rev , were evaluated in order to investigate the hysteretic behavior of M rev . Additional characterization was done in order to investigate the elemental composition, structure, and morphology of the samples.
  • Idioma: Inglês

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