Time Dependence of Magnetic Properties in Perpendicular Recording Media

• HONDA Naoki

  AIT (Akita Research Institute of Advanced Technology)

• OUCHI Kazuhiro

  AIT (Akita Research Institute of Advanced Technology)

抄録

Time decay of magnetic properties in perpendicular magnetic recording media was studied. It was suggested that magnetization in media with a low energy ratio, KV/kT, of 50 is thermally stable in the absence of a demagnetizing field while coercivity exhibits a large time dependence. Magnetization in perpendicular recording media exhibited an appreciable time decay even for films with a large energy ratio of 300. The decay is attributed to the small perpendicular squareness due to a large perpendicular demagnetizing field acting in the media. The recording density dependence of the time decay in the output was explained in terms of the change in the demagnetizing field with the density. It is concluded that the use of media with large squareness as well as large energy ratio effectively reduces time decay in the output.

収録刊行物

• IEICE transactions on electronics

  IEICE transactions on electronics 80 (9), 1180-1186, 1997-09-25

  一般社団法人電子情報通信学会

キーワード

• time decay of magnetization
• perpendicular media
• demagnetizing field
• squareness
• time decay in output

詳細情報

• CRID: 1570009752558760832
• NII論文ID: 110003211330
• NII書誌ID: AA10826283
• ISSN: 09168524
• 本文言語コード: en
• データソース種別:
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