WO2009025148A1 - Magnetic recording medium - Google Patents

Magnetic recording medium Download PDF

Info

Publication number
WO2009025148A1
WO2009025148A1 PCT/JP2008/063401 JP2008063401W WO2009025148A1 WO 2009025148 A1 WO2009025148 A1 WO 2009025148A1 JP 2008063401 W JP2008063401 W JP 2008063401W WO 2009025148 A1 WO2009025148 A1 WO 2009025148A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording medium
magnetic recording
magnetic substance
substance grains
magnetic
Prior art date
Application number
PCT/JP2008/063401
Other languages
French (fr)
Japanese (ja)
Inventor
Motohiro Yamada
Masahiro Morikawa
Osamu Masuda
Makiko Saito
Original Assignee
Konica Minolta Holdings, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Holdings, Inc. filed Critical Konica Minolta Holdings, Inc.
Priority to JP2009528988A priority Critical patent/JPWO2009025148A1/en
Publication of WO2009025148A1 publication Critical patent/WO2009025148A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material

Abstract

A magnetic recording medium that can realize an enhancement of thermal disturbance resistance and can ensure a high magnetic anisotropy. The magnetic recording medium (1) comprises a disk-shaped substrate (2) and, arranged perpendicularly thereto, multiple columnar magnetic substance grains (3). The multiple magnetic substance grains (3) have a hexagonal arrangement. A nonmagnetic element, such as void or a surfactant, is provided between individual magnetic substance grains (3), so that the individual magnetic substance grains (3) are separated from each other by the nonmagnetic element.
PCT/JP2008/063401 2007-08-22 2008-07-25 Magnetic recording medium WO2009025148A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009528988A JPWO2009025148A1 (en) 2007-08-22 2008-07-25 Magnetic recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007215516 2007-08-22
JP2007-215516 2007-08-22

Publications (1)

Publication Number Publication Date
WO2009025148A1 true WO2009025148A1 (en) 2009-02-26

Family

ID=40378056

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/063401 WO2009025148A1 (en) 2007-08-22 2008-07-25 Magnetic recording medium

Country Status (2)

Country Link
JP (1) JPWO2009025148A1 (en)
WO (1) WO2009025148A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116707A1 (en) * 2009-04-09 2010-10-14 パナソニック株式会社 Information recording medium and method for manufacturing information recording medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003132519A (en) * 2001-10-25 2003-05-09 Hitachi Ltd Magnetic recording medium formed by magnetic nanoparticles and recording method using the same
JP2004123528A (en) * 2002-10-02 2004-04-22 Korea Inst Of Science & Technology Metal oxide nanopowder and its producing method
JP2004322237A (en) * 2003-04-22 2004-11-18 Toshiba Corp Particle arranging base board and its manufacturing method
JP2006169569A (en) * 2004-12-14 2006-06-29 Fujitsu Ltd Nanoparticle and magnetic recording medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003132519A (en) * 2001-10-25 2003-05-09 Hitachi Ltd Magnetic recording medium formed by magnetic nanoparticles and recording method using the same
JP2004123528A (en) * 2002-10-02 2004-04-22 Korea Inst Of Science & Technology Metal oxide nanopowder and its producing method
JP2004322237A (en) * 2003-04-22 2004-11-18 Toshiba Corp Particle arranging base board and its manufacturing method
JP2006169569A (en) * 2004-12-14 2006-06-29 Fujitsu Ltd Nanoparticle and magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116707A1 (en) * 2009-04-09 2010-10-14 パナソニック株式会社 Information recording medium and method for manufacturing information recording medium
CN102379006A (en) * 2009-04-09 2012-03-14 松下电器产业株式会社 Information recording medium and method for manufacturing information recording medium

Also Published As

Publication number Publication date
JPWO2009025148A1 (en) 2010-11-18

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