WO2009048045A1 - 垂直磁気記録媒体 - Google Patents

垂直磁気記録媒体 Download PDF

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Publication number
WO2009048045A1
WO2009048045A1 PCT/JP2008/068177 JP2008068177W WO2009048045A1 WO 2009048045 A1 WO2009048045 A1 WO 2009048045A1 JP 2008068177 W JP2008068177 W JP 2008068177W WO 2009048045 A1 WO2009048045 A1 WO 2009048045A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
recording medium
perpendicular magnetic
layer
continuous
Prior art date
Application number
PCT/JP2008/068177
Other languages
English (en)
French (fr)
Inventor
Takahiro Onoue
Original Assignee
Hoya Corporation
Hoya Magnetics Singapore Pte. Ltd
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 Hoya Corporation, Hoya Magnetics Singapore Pte. Ltd filed Critical Hoya Corporation
Priority to US12/666,255 priority Critical patent/US8603649B2/en
Publication of WO2009048045A1 publication Critical patent/WO2009048045A1/ja

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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/674—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having differing macroscopic or microscopic structures, e.g. differing crystalline lattices, varying atomic structures or differing roughnesses
    • 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
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/672—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

　コバルト（Ｃｏ）を含有し柱状に成長した結晶粒子の間に非磁性物質からなる粒界部を形成したグラニュラー構造の磁気記録層２２と、面方向に磁気的に連続した薄膜からなる連続層２４とを備える垂直磁気記録媒体において、連続層２４はコバルト、クロム（Ｃｒ）、プラチナ（Ｐｔ）を含有する複数の層２４ａ、２４ｂを含み、複数の層のうち、磁気記録層に近い層２４ａほどクロム含量が大きいことを特徴とする。
PCT/JP2008/068177 2007-10-07 2008-10-06 垂直磁気記録媒体 WO2009048045A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/666,255 US8603649B2 (en) 2007-10-07 2008-10-06 Perpendicular magnetic recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-262795 2007-10-07
JP2007262795 2007-10-07

Publications (1)

Publication Number Publication Date
WO2009048045A1 true WO2009048045A1 (ja) 2009-04-16

Family

ID=40549189

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068177 WO2009048045A1 (ja) 2007-10-07 2008-10-06 垂直磁気記録媒体

Country Status (3)

Country Link
US (1) US8603649B2 (ja)
JP (1) JP5401069B2 (ja)
WO (1) WO2009048045A1 (ja)

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Also Published As

Publication number Publication date
US8603649B2 (en) 2013-12-10
JP2009110641A (ja) 2009-05-21
JP5401069B2 (ja) 2014-01-29
US20100323220A1 (en) 2010-12-23

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