Title:
PERPENDICULAR MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPH01191318
Kind Code:
A
Abstract:
PURPOSE:To improve magnetic characteristics and practicable characteristics and to enable dealing with high-density recording by forming a thin film of a Co-Pd alloy having a specific compsn. as a magnetic layer. CONSTITUTION:The thin alloy film consisting of 10-40atom.% Co and 60-90atom.% Pd is formed as the magnetic layer. Namely, the thin alloy film which constitutes the magnetic layer can be expressed by the general formula Cox.Pd100-x (where x denotes the compsn. by atom.% and is 10<=x<=40). The magnetorestriction constant of the thin film of the Co-Pd alloy attains a large negative value when the content of the Pd in particular is confined to 40-90atom.%. Excellent perpendicular magnetic anisotropy is developed by a reverse magnetorestriction effect when an internal stress sigma is made into a tensile stress. The practicable characteristics such as film characteristics are thereby improved and the high-quality and high-density perpendicular magnetic recording is enabled.
Inventors:
HASHIMOTO SHUNICHI
OCHIAI YOSHITAKA
ASO KOICHI
OCHIAI YOSHITAKA
ASO KOICHI
Application Number:
JP1493588A
Publication Date:
August 01, 1989
Filing Date:
January 26, 1988
Export Citation:
Assignee:
SONY CORP
International Classes:
G11B5/66; G11B5/64; G11B5/706; (IPC1-7): G11B5/66; G11B5/706
Attorney, Agent or Firm:
Akira Koike (2 outside)
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