MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME

MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a magnetic recording medium for a magnetic storage apparatus, in which information can be recorded/reproduced at a high-density, and in which the deterioration of the reproduced signal due to the thermal demagnetization is little. SOLUTION: In the magnetic recording...

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Hauptverfasser: SAKAMOTO KOJI, MATSUDA YOSHIFUMI, KANBE TETSUYA, YAKU YOTSUO
Format: Patent
Sprache:eng
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INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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creator SAKAMOTO KOJI
MATSUDA YOSHIFUMI
KANBE TETSUYA
YAKU YOTSUO
description PROBLEM TO BE SOLVED: To provide a magnetic recording medium for a magnetic storage apparatus, in which information can be recorded/reproduced at a high-density, and in which the deterioration of the reproduced signal due to the thermal demagnetization is little. SOLUTION: In the magnetic recording medium, in which a first under film to be formed on a nonmagnetic substrate consists of a NiTa alloy being nonmagnetic and having an amorphous structure, and in which a second under film thereon consists of an alloy at least including Cr and Ti, and in which a first magnetic film thereon consisting of a CoCrPt alloy, a nonmagnetic intermediate film consisting of Ru, and a second magnetic film consisting of a CoCrPtB alloy are serially formed, oxygen locally exists on the interface between the first under film and the second under film. The noise which arises from the medium is reduced, a high S/N is obtained, and the magnetic storage apparatus with a high recording density equal to or more than 46.5 Mbits per 1 mm can be realized.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
title MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME
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