• DocumentCode
    1050781
  • Title

    Problems in magnetic recording on relatively thick media

  • Author

    Hatoyama, Geokge M. ; Ohkubo, Hiroyuki ; Kikuchi, Saburo

  • Author_Institution
    Sony Magnescale, Inc., Shinagawaku, Tokyo, Japan
  • Volume
    8
  • Issue
    3
  • fYear
    1972
  • fDate
    9/1/1972 12:00:00 AM
  • Firstpage
    577
  • Lastpage
    578
  • Abstract
    The decay of a magnetic scale signal due to repeated reading is measured, and its relation to the magnetic properties of the recording material is studied. A sine-wave signal of wavelength 0.2 mm is recorded on Cu-Ni-Fe alloy plates 0.3 mm thick. The signal is read by a flux-sensitive multigap reading head. It is found that the penetration of the recorded signal into ordinary Cunife (Cu:Ni:Fe = 60:20:20; Br= 5 kG, Hc= 370 Oe) is only a few μm. Both the "magnetic wear" and the depth of the signal penetration has been improved over Cunife by reducing the Br/Hcratio down to about 5.
  • Keywords
    Copper-nickel-iron alloy; Iron-nickel-copper alloys; Magnetic recording materials; Cobalt alloys; Demagnetization; Length measurement; Magnetic heads; Magnetic materials; Magnetic properties; Magnetic recording; Manganese alloys; Thickness measurement; Wavelength measurement;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1972.1067459
  • Filename
    1067459
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1050781