• DocumentCode
    1011783
  • Title

    Wear-resistance and signal-to-noise ratio in γ-Fe2O3thin film disks

  • Author

    Terada, A. ; Ishii, O. ; Ohta, S.

  • Author_Institution
    NTT Ibaraki Electrical Communication Laboratories, Tokai, Ibaraki, Japan
  • Volume
    21
  • Issue
    5
  • fYear
    1985
  • fDate
    9/1/1985 12:00:00 AM
  • Firstpage
    1521
  • Lastpage
    1523
  • Abstract
    Wear-resistance in an Al2O3pin-disk wear-test and SNR for γ-Fe2O3thin film disk composites (γ-Fe2O3thin film/substrate) were investigated. It was found that wear-resistance enhancement for the films is essentially accompanied by SNR deterioration due to crystallite growth. On the other hand, an increased Knoop hardness, HK, for the substrate surface greatly enhanced wear-resistance. Use of heat-resistant, defect-free CrO3anodization substrates, which have 420 kg/mm2HK, successfully minimized the wear-depth. Finally, it was found that the γ-Fe2O3thin film disks with a high-SNR can have higher wear-resistance than metallic thin film disks, because the oxide films themselves have high hardness.
  • Keywords
    Magnetic disk recording; Magnetic noise; Mechanical factors; Crystallization; Disk drives; Iron; Noise reduction; Signal to noise ratio; Substrates; Surface cracks; Testing; Thickness control; Transistors;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1985.1063946
  • Filename
    1063946
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1011783