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WO2008136453A1 - 磁気記録媒体、その製造方法および磁気記録再生装置 - Google Patents

磁気記録媒体、その製造方法および磁気記録再生装置 Download PDF

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Publication number
WO2008136453A1
WO2008136453A1 PCT/JP2008/058172 JP2008058172W WO2008136453A1 WO 2008136453 A1 WO2008136453 A1 WO 2008136453A1 JP 2008058172 W JP2008058172 W JP 2008058172W WO 2008136453 A1 WO2008136453 A1 WO 2008136453A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
layer
oxide
recording medium
grain boundaries
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/JP2008/058172
Other languages
English (en)
French (fr)
Inventor
Ryuji Sakaguchi
Gouhei Kurokawa
Yuzo Sasaki
Tatsu Komatsuda
Amarendra K. Singh
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Priority to CN200880021665A priority Critical patent/CN101689375A/zh
Priority to US12/597,699 priority patent/US20100079911A1/en
Publication of WO2008136453A1 publication Critical patent/WO2008136453A1/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
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
    • 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

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

　非磁性基板上に、裏打ち層と下地層と中間層と少なくとも１層の垂直磁気記録層を有する垂直磁気記録媒体であって、前記垂直磁気記録層はＣｏ及びＣｒを含み、その少なくとも１層が、強磁性の結晶粒と非磁性である酸化物の結晶粒界とから構成されるグラニュラ構造をとり、該結晶粒界を構成する酸化物がＷ酸化物を含む。他の態様としては、前記垂直磁気記録層を、Ｗ酸化物を結晶粒界とする磁気記録層と、その上に形成されたCr酸化物、Ｓｉ酸化物、Ｔａ酸化物またはＴｉ酸化物を結晶粒界とする磁気記録層を有する複数層のグラニュラ構造を有するものとする。この磁気記録媒体は、垂直磁性層の垂直配向性に優れ、かつ強磁性結晶粒の平均粒径が極めて微細であるという特性を有し、高記録密度特性に優る。
PCT/JP2008/058172 2007-04-27 2008-04-28 磁気記録媒体、その製造方法および磁気記録再生装置 Ceased WO2008136453A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880021665A CN101689375A (zh) 2007-04-27 2008-04-28 磁记录介质、其制造方法及磁记录再生装置
US12/597,699 US20100079911A1 (en) 2007-04-27 2008-04-28 Magnetic recording medium, process for producing same, and magnetic recording reproducing apparatus using the magnetic recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-119008 2007-04-27
JP2007119008A JP2008276859A (ja) 2007-04-27 2007-04-27 磁気記録媒体、その製造方法および磁気記録再生装置

Publications (1)

Publication Number Publication Date
WO2008136453A1 true WO2008136453A1 (ja) 2008-11-13

Family

ID=39943560

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/058172 Ceased WO2008136453A1 (ja) 2007-04-27 2008-04-28 磁気記録媒体、その製造方法および磁気記録再生装置

Country Status (5)

Country Link
US (1) US20100079911A1 (ja)
JP (1) JP2008276859A (ja)
CN (1) CN101689375A (ja)
TW (1) TW200919456A (ja)
WO (1) WO2008136453A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8673466B2 (en) * 2006-09-25 2014-03-18 Seagate Technology Llc CoPtCr-based bit patterned magnetic media
WO2013005785A1 (ja) 2011-07-06 2013-01-10 日立金属株式会社 軟磁性下地層
US9147833B2 (en) * 2013-07-05 2015-09-29 Headway Technologies, Inc. Hybridized oxide capping layer for perpendicular magnetic anisotropy
JP6781679B2 (ja) * 2017-09-11 2020-11-04 株式会社神戸製鋼所 記録層、光情報記録媒体及びスパッタリングターゲット
JP7645649B2 (ja) * 2021-02-04 2025-03-14 株式会社レゾナック・ハードディスク 磁気記録媒体、磁気記録再生装置及び磁気記録媒体の製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005100537A (ja) * 2003-09-25 2005-04-14 Toshiba Corp 垂直磁気記録媒体、及び磁気記録再生装置
JP2006299400A (ja) * 2005-04-19 2006-11-02 Heraeus Inc スパッタターゲット及び磁気記録媒体並びに磁気記録媒体の製造方法
JP2007087575A (ja) * 2005-09-22 2007-04-05 Seagate Technology Llc 磁気記録媒体におけるチューニング交換結合

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW390998B (en) * 1996-05-20 2000-05-21 Hitachi Ltd Magnetic recording media and magnetic recording system using the same
WO2005031713A1 (en) * 2003-09-25 2005-04-07 Kabushiki Kaisha Toshiba Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
US7736765B2 (en) * 2004-12-28 2010-06-15 Seagate Technology Llc Granular perpendicular magnetic recording media with dual recording layer and method of fabricating same
US7691499B2 (en) * 2006-04-21 2010-04-06 Seagate Technology Llc Corrosion-resistant granular magnetic media with improved recording performance and methods of manufacturing same
WO2008038664A1 (en) * 2006-09-29 2008-04-03 Hoya Corporation Magnetic recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005100537A (ja) * 2003-09-25 2005-04-14 Toshiba Corp 垂直磁気記録媒体、及び磁気記録再生装置
JP2006299400A (ja) * 2005-04-19 2006-11-02 Heraeus Inc スパッタターゲット及び磁気記録媒体並びに磁気記録媒体の製造方法
JP2007087575A (ja) * 2005-09-22 2007-04-05 Seagate Technology Llc 磁気記録媒体におけるチューニング交換結合

Also Published As

Publication number Publication date
US20100079911A1 (en) 2010-04-01
TW200919456A (en) 2009-05-01
JP2008276859A (ja) 2008-11-13
CN101689375A (zh) 2010-03-31

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