• DocumentCode
    951598
  • Title

    A new high coercive magnetic particle for recording tape

  • Author

    Umeki, Shinji ; Saitoh, Seitoku ; Imaoka, Yasuo

  • Author_Institution
    TDK Electronics Co., Ltd., Tokyo, Japan
  • Volume
    10
  • Issue
    3
  • fYear
    1974
  • fDate
    9/1/1974 12:00:00 AM
  • Firstpage
    655
  • Lastpage
    656
  • Abstract
    A high coercive magnetic particle named AVILYN has been developed. This new particle is an acicular magnetic iron oxide on whose surface certain cobalt compounds have been adsorbed. The coercive force of the particles is determined by the amount of cobalt and other preparing conditions, and is controllable between 450 and 800 Oe. The particles display much improved thermal stability with respect to remanence and coercive force. The new video tape having a coercive force of 550 Oe is compatible with CrO2video tape in recording characteristics according to our measurement on a conventional VTR. The head wear rate of the tape is about one-fifth that of CrO2tape, and is almost the same as for conventional iron oxide tape. Tape demagnetization is not as serious as is in the case of cobalt-doped γ-Fe2O3tapes.
  • Keywords
    Magnetic tape materials; Videotapes; Cobalt; Coercive force; Displays; Force control; Iron; Magnetic particles; Magnetic recording; Thermal force; Thermal stability; Video recording;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1974.1058359
  • Filename
    1058359
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=951598