WO2008126133A1 - 垂直磁気記録媒体 - Google Patents

垂直磁気記録媒体 Download PDF

Info

Publication number
WO2008126133A1
WO2008126133A1 PCT/JP2007/000260 JP2007000260W WO2008126133A1 WO 2008126133 A1 WO2008126133 A1 WO 2008126133A1 JP 2007000260 W JP2007000260 W JP 2007000260W WO 2008126133 A1 WO2008126133 A1 WO 2008126133A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
perpendicular magnetic
superimposed
magnetic recording
recording medium
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2007/000260
Other languages
English (en)
French (fr)
Inventor
Toshio Sugimoto
Ryo Kurita
Ajan Antony
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to PCT/JP2007/000260 priority Critical patent/WO2008126133A1/ja
Priority to JP2009508687A priority patent/JPWO2008126133A1/ja
Priority to US12/532,122 priority patent/US20100143750A1/en
Publication of WO2008126133A1 publication Critical patent/WO2008126133A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G11B5/676—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 magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
    • G11B5/678—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 magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer having three or more magnetic layers
    • 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
    • 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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording 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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737—Physical structure of underlayer, e.g. texture

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)

Abstract

　結合層製造工程のマージンが広く、書き込みが容易で、隣接ビット書き込みによって書き換えられにくい、垂直磁気記録媒体を提供する。 　垂直磁気記録媒体は、非磁性基板と、非磁性基板上方に形成された軟磁性裏打ち層と、軟磁性裏打ち層上に形成された非磁性中間層と、中間層上に形成された磁気記録層であって、垂直磁気異方性を有する第１の強磁性記録層と、第１の強磁性記録層上に形成され、Ｐｄ、Ｐｔ、これらの合金のいずれかで形成された結合層と、結合層上に形成され、垂直磁気異方性を有する第２の強磁性記録層を含む磁気記録層と、を有する。
PCT/JP2007/000260 2007-03-19 2007-03-19 垂直磁気記録媒体 Ceased WO2008126133A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2007/000260 WO2008126133A1 (ja) 2007-03-19 2007-03-19 垂直磁気記録媒体
JP2009508687A JPWO2008126133A1 (ja) 2007-03-19 2007-03-19 垂直磁気記録媒体
US12/532,122 US20100143750A1 (en) 2007-03-19 2007-05-22 Perpendicular magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/000260 WO2008126133A1 (ja) 2007-03-19 2007-03-19 垂直磁気記録媒体

Publications (1)

Publication Number Publication Date
WO2008126133A1 true WO2008126133A1 (ja) 2008-10-23

Family

ID=39863319

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/000260 Ceased WO2008126133A1 (ja) 2007-03-19 2007-03-19 垂直磁気記録媒体

Country Status (3)

Country Link
US (1) US20100143750A1 (ja)
JP (1) JPWO2008126133A1 (ja)
WO (1) WO2008126133A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8320232B1 (en) * 2011-07-21 2012-11-27 Hitachi Global Storage Technologies Netherlands B.V. Patterned perpendicular magnetic recording medium with multiple magnetic layers and interlayers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004039033A (ja) * 2002-06-28 2004-02-05 Toshiba Corp 磁気記録媒体及び磁気記録再生装置
WO2006003922A1 (ja) * 2004-06-30 2006-01-12 Hoya Corporation 垂直磁気記録ディスク及びその製造方法
JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003157516A (ja) * 2001-11-22 2003-05-30 Toshiba Corp 垂直磁気記録媒体および磁気記録装置
US7175925B2 (en) * 2003-06-03 2007-02-13 Seagate Technology Llc Perpendicular magnetic recording media with improved crystallographic orientations and method of manufacturing same
WO2005031713A1 (en) * 2003-09-25 2005-04-07 Kabushiki Kaisha Toshiba Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
JP4623594B2 (ja) * 2006-09-05 2011-02-02 富士電機ホールディングス株式会社 垂直磁気記録媒体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004039033A (ja) * 2002-06-28 2004-02-05 Toshiba Corp 磁気記録媒体及び磁気記録再生装置
WO2006003922A1 (ja) * 2004-06-30 2006-01-12 Hoya Corporation 垂直磁気記録ディスク及びその製造方法
JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体

Also Published As

Publication number Publication date
US20100143750A1 (en) 2010-06-10
JPWO2008126133A1 (ja) 2010-07-15

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