Magnetic Properties and Noise Characteristics of FeC Film for Backlayer of Double-layered Perpendicular Magnetic Recording Medium
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- Kawano Hiroyasu
- Fujitsu Laboratories L td.
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- Morikawa Takeshi
- Fujitsu Laboratories L td.
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- Matsumoto Koji
- Fujitsu Laboratories L td.
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- Shone Keiji
- Fujitsu Laboratories L td.
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抄録
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.
収録刊行物
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- Transactions of the Magnetics Society of Japan
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Transactions of the Magnetics Society of Japan 2 (2), 23-27, 2002
社団法人 日本磁気学会
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詳細情報
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- CRID
- 1390001205222624896
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- NII論文ID
- 110002682769
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- NII書誌ID
- AA1158094X
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- ISSN
- 18846726
- 13467948
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可