MAGNETIC RECORDING MEDIUM, ITS MANUFACTURING METHOD, AND MAGNETIC RECORDER

WIPO Patent Application WO/2003/049085

A1

A magnetic recording medium (100) comprises a substrate (1), a first orientation control layer (2), a second orientation control layer (4), a soft magnetic layer (6), a nonmagnetic layer (8), a recording layer (12), and a carbon protective layer (14), all the layers being provided on the substrate (1). The recording layer (12) is made of FePt ordered alloy phases exhibiting ferromagnetism and FePt₃ ordered alloy phases exhibiting paramagnetism. The magnetic attraction force acting between the FePt ordered alloy phases is cut off by the FePt₃ ordered alloy phases exhibiting paramagnetism, and the magnetic interaction between the FePt ordered alloy phases is reduced, thus reducing noise. The recording layer (12) is made of an FePt ordered alloy having a high crystal magnetic anisotropy, and therefore the thermal stability is excellent, thus enabling high−density recording.

KODA TETSUNORI (JP)
INABA NOBUYUKI (JP)
YAMANAKA HIDEAKI (JP)
FUJITA ENJI (JP)
MATSUNUMA SATOSHI (JP)

PCT/JP2002/012634

June 12, 2003

December 03, 2002

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HITACHI MAXELL (JP)
KODA TETSUNORI (JP)
INABA NOBUYUKI (JP)
YAMANAKA HIDEAKI (JP)
FUJITA ENJI (JP)
MATSUNUMA SATOSHI (JP)

G11B5/64; G11B5/65; G11B5/667; G11B5/73; G11B5/738; G11B5/851; H01F10/16; (IPC1-7): G11B5/65; G11B5/667; G11B5/738; G11B5/73; G11B5/851

JP2001176048A	2001-06-29
JPH11353648A	1999-12-24
JP2001101645A	2001-04-13
JP2003006830A	2003-01-10
JPH09320847A	1997-12-12
JP2001056931A	2001-02-27
JP2001283419A	2001-10-12
JP2002123920A	2002-04-26

Kawakita, Kijuro (1-15 Shinjuku 5-chom, Shinjuku-ku Tokyo, JP)

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