• DocumentCode
    974147
  • Title

    Origin of coercivity changes during the oxidation of Fe3O4to γ-Fe2O3

  • Author

    Kojima, Hiroshi ; Hanada, Koichi

  • Author_Institution
    Tohoku University, Sanjyo-Machi, Sendai, Japan
  • Volume
    16
  • Issue
    1
  • fYear
    1980
  • fDate
    1/1/1980 12:00:00 AM
  • Firstpage
    11
  • Lastpage
    13
  • Abstract
    Oxidation kinetics and x-ray diffraction of the intermediate products have been investigated for several kinds of Fe3O4powders during the oxidation to γFe2O3. From these results, a two-components-hypothesis as an intermediate state of the Fe3O4- γFe2O3system is proposed, instead of a homogenious solid solution which has been widely recognized. The effect of the changes in particle size caused by the two phases oxidation products on the variations of magnetic coercivity was emphasised.
  • Keywords
    Coercive forces; Magnetic tape recording; Powdered magnetic materials/devices; Chemical analysis; Coercive force; Glass; Iron; Kinetic theory; Magnetic field measurement; Magnetic materials; Oxidation; Powders; X-ray diffraction;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1980.1060539
  • Filename
    1060539
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=974147