Effect of underlayers on magnetic properties of Co/Pd multilayer perpendicular magnetic recording media

T. Onoue*, J. Kawaji, K. Kuramochi, T. Asahi, T. Osaka

*この研究の対応する著者

研究成果: Conference article査読

17 被引用数 (Scopus)

抄録

Amorphous C and Si films were sputter-deposited as underlayers of Co/Pd multilayer perpendicular magnetic recording media. The magnetic properties of the media were significantly affected by the underlayer thickness; namely, the values of coercivity Hc and nucleation field -Hn increased and the value of α decreased with merely increasing the thickness of C or Si underlayer, where α is the derivative of M-H loop at the value of coercivity. The coercivity was not always affected by magnetic anisotropy constant Ku for the Co/Pd media. In read-write experiments, the higher S/N ratio was obtained for the media with the thicker C or Si underlayer, which exhibited low α and high Hc. In the time decay experiments of magnetization, the Co/Pd multilayer media with C or Si underlayer possessed good thermal stability. This study demonstrated that the introduction of C or Si underlayer greatly improves magnetic properties, read-write characteristics, and thermal stability of Co/Pd multilayer perpendicular magnetic recording media.

本文言語English
ページ(範囲)82-86
ページ数5
ジャーナルJournal of Magnetism and Magnetic Materials
235
1-3
DOI
出版ステータスPublished - 2001 10
イベントProceedings of the 5th Perpendicular Magnetic Recording Conference (PMRC 2000) - Sendai, Japan
継続期間: 2000 10 232000 10 26

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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