公开(公告)号：JP2001126229A

公开(公告)日：2001-05-11

申请号：JP2000321475

申请日：2000-10-20

Applicant: IBM JAPAN

Inventor： SONOBE YOSHIAKI ,  IKEDA YOSHIHIRO ,  UCHIDA HIROSHI ,  TOYOOKA TAKASHI ,  TAGASHIRA KAKO

IPC: G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/667 ,  G11B5/738 ,  G11B5/82 ,  H01F10/16

Abstract: PROBLEM TO BE SOLVED: To provide a perpendicular recording medium suitable for using a head utilizing a magneto resistance effect as a reproducing head. SOLUTION: A perpendicular magnetic recording medium having a laminated structure including plural recording layers is characterized in that at least one layer of the recording layers is a perpendicularly magnetized film layer having a composition expressed by the formula (Co100-xCrx)100-yPty wherein x and y are in the range of 27

公开(公告)号：JPH09298114A

公开(公告)日：1997-11-18

申请号：JP646397

申请日：1997-01-17

Applicant: IBM JAPAN

Inventor： SONOBE YOSHIAKI ,  IKEDA YOSHIHIRO ,  UCHIDA HIROSHI ,  TOYOOKA TAKASHI ,  TAGASHIRA KAKO

IPC: C23C14/14 ,  G11B5/00 ,  G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  H01F10/16

Abstract: PROBLEM TO BE SOLVED: To obtain a good vertical magnetic interaction as one of the characteristics of a vertical magnetic recording medium by a method wherein the composition of a vertical magnetizing film contains Co and Cr, the amount of the Cr is set in the extent of a specified atomic % of higher to a specified atomic % or lower and the vertical magnetizing film is magnetized in the vertical direction to the film surface of the magnetizing film. SOLUTION: A vertical magnetizing film 12 is formed on a glass substrate 10 as a recording layer via a base layer 11 consisting of a Ti layer. The composition of the film 12 contains Co and Cr, the amount of the Cr is contained more than 22 atomic % and is contained within the extent of 30 atomic % of lower and the film 12 is made to magnetize in the vertical direction to the film surface of the film 12. Thereby, a good vertical magnetic interaction can be obtained as one of the characteristics of a vertical magnetic recording medium and though the output of a magnetic recording device is reduced in the extent that the amount of the Cr is 22 atomic % or higher to 30 atomic % or lower, the device can obtain a good S/N ratio.