Magnetic Properties and Noise Characteristics of FeC Film for Backlayer of Double-layered Perpendicular Magnetic Recording Medium

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The relationships among magnetic properties, film structures, and noise characteristics of FeC films were examined with particular emphasis on soft magnetic backlayers of double-layered perpendicular magneti recording media. FeC films were fabricated on glass disks using DC magnetron sputtering by a conventional cosputtering method with Fe and C targets. The films were deposited at room temperature without application of magnetic fields. No heat processes were applied after deposition. The Fe and C contents in the films were varied by individually controlling the electrical power for the Fe and C targets. Nana-scale downsizing for both the film structures and the magnetic domains and the formation of radial magnetic anisotropy in an as-deposited state produce soft magnetic FeC films with both low media noise and high saturation magnetization of around 19 kGauss. A coercive force in the magnetic easy axis of less than 1 Oe reduces media noise in the FeC film. An anisotropy field of over 20 Oe suppresses spike noise in the FeC film. A high electrical resistivity of about 120 μΩcm and a high permeability of around 900 that remains constant up to 1 GHz in FeC films suggest future applications for high density recording media.

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詳細情報

  • CRID
    1390001205222624896
  • NII論文ID
    110002682769
  • NII書誌ID
    AA1158094X
  • DOI
    10.3379/tmjpn2001.2.23
  • ISSN
    18846726
    13467948
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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