• DocumentCode
    1259406
  • Title

    Large coercivity and granular structure of CoPt/SiO2 films

  • Author

    Chen, Chen ; Kitakami, Osamu ; Okamoto, Satoshi ; Shimada, Yutaka ; Shibata, Kichiro ; Tanaka, Michiyoshi

  • Author_Institution
    Res. Inst. for Sci. Meas., Tohoku Univ., Sendai, Japan
  • Volume
    35
  • Issue
    5
  • fYear
    1999
  • fDate
    9/1/1999 12:00:00 AM
  • Firstpage
    3466
  • Lastpage
    3468
  • Abstract
    By post-annealing the as-prepared CoPt/SiO2 samples with the atomic ratio of Co: Pt=47.5: 52.5, high coercivity Hc≈14 kOe was obtained at room temperature. TEM and XRD revealed the ordered fct (L10) structure with the lattice constant ratio c/a=0.97 in the granular films with the average grain size around 10-20 nm. The grain size and packing density effect on coercivity are also discussed
  • Keywords
    X-ray diffraction; annealing; cobalt alloys; coercive force; discontinuous metallic thin films; ferromagnetic materials; grain size; magnetic thin films; platinum alloys; silicon compounds; transmission electron microscopy; CoPt; CoPt/SiO2 films; SiO2; TEM; XRD; grain size; granular films; granular structure; large coercivity; lattice constant ratio; ordered fct (L10) structure; packing density; post-annealing; Annealing; Atomic measurements; Coercive force; Grain size; Magnetic anisotropy; Magnetic films; Magnetic recording; Saturation magnetization; Substrates; Temperature;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.800559
  • Filename
    800559
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1259406