Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
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Volume 23, Issue 12
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Contributed Paper
  • Magnetic After-Effects in Barium Hexagonal Ferrites with BaO·6Fe2O3 (M-Type) Stoichiometry
    P. Hernández-Gomez, K. Hisatake, C. de Francisco, J. M. Mu&ntil ...
    1999 Volume 23 Issue 12 Pages 2134-2139
    Published: 1999
    Released on J-STAGE: March 20, 2007
    DOIhttps://doi.org/10.3379/jmsjmag.23.2134
    JOURNAL OPEN ACCESS
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    The time decay of the relative initial magnetic susceptibility after sample demagnetization was measured in the temperature range 80 K < T < 420 K in series of samples with initial composition BaO·6Fe2O3, that is, the stoichiometric M-type barium ferrites. These samples were sintered under various conditions of temperature and partial oxygen pressure. The results were represented by means of isochronal curves. We observed that the behavior varies drastically according to the sintering atmosphere. The underlying mechanisms responsible for the relaxation phenomena observed are pointed out in terms of the formation of different hexagonal phases and the existence of ferrous cations within the hexagonal structure.
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