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WO2009044794A1 - 垂直磁気記録媒体および磁気記録再生装置 - Google Patents

垂直磁気記録媒体および磁気記録再生装置 Download PDF

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Publication number
WO2009044794A1
WO2009044794A1 PCT/JP2008/067903 JP2008067903W WO2009044794A1 WO 2009044794 A1 WO2009044794 A1 WO 2009044794A1 JP 2008067903 W JP2008067903 W JP 2008067903W WO 2009044794 A1 WO2009044794 A1 WO 2009044794A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
layer
magnetic
recording layer
reproduction device
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/JP2008/067903
Other languages
English (en)
French (fr)
Inventor
Yuzo Sasaki
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 US12/681,061 priority Critical patent/US8247094B2/en
Priority to CN200880110178A priority patent/CN101816042A/zh
Publication of WO2009044794A1 publication Critical patent/WO2009044794A1/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

Landscapes

  • Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)

Abstract

　本発明は、非磁性基板上に、少なくとも裏打ち層、配向制御層、磁気記録層、保護層を有する垂直磁気記録媒体であって、磁気記録層は３層以上から構成され、基板側から第一磁気記録層、第二磁気記録層、第三磁気記録層を含み、第二磁気記録層と第三磁気記録層との間に両層の交換結合を低減する交換結合低減層を含み、それぞれの磁気記録層の結晶磁気異方性エネルギー（Ｋｕ）が、第一磁気記録層が４×１０６（ｅｒｇ／ｃｃ）以上、第二磁気記録層が２×１０６（ｅｒｇ／ｃｃ）以下、第三磁気記録層が１×１０６（ｅｒｇ／ｃｃ）以下であることを特徴とする垂直磁気記録媒体に関する。さらに、本発明は、この垂直磁気記録媒体を用いた磁気記録再生装置に関する。
PCT/JP2008/067903 2007-10-03 2008-10-02 垂直磁気記録媒体および磁気記録再生装置 Ceased WO2009044794A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/681,061 US8247094B2 (en) 2007-10-03 2008-10-02 Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus
CN200880110178A CN101816042A (zh) 2007-10-03 2008-10-02 垂直磁记录介质和磁记录再生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-259305 2007-10-03
JP2007259305A JP2009087500A (ja) 2007-10-03 2007-10-03 垂直磁気記録媒体および磁気記録再生装置

Publications (1)

Publication Number Publication Date
WO2009044794A1 true WO2009044794A1 (ja) 2009-04-09

Family

ID=40526218

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067903 Ceased WO2009044794A1 (ja) 2007-10-03 2008-10-02 垂直磁気記録媒体および磁気記録再生装置

Country Status (4)

Country Link
US (1) US8247094B2 (ja)
JP (1) JP2009087500A (ja)
CN (1) CN101816042A (ja)
WO (1) WO2009044794A1 (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010038448A1 (ja) * 2008-09-30 2010-04-08 Hoya株式会社 垂直磁気記録媒体
US8168310B2 (en) 2009-12-15 2012-05-01 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording media with oxide-containing exchange coupling layer
US20120307395A1 (en) * 2011-05-31 2012-12-06 Hitachi Global Storage Technologies Netherlands B.V. PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH AN INVERTED Hk STRUCTURE
US8394243B1 (en) 2008-07-24 2013-03-12 Wd Media, Inc. Sputtered cobalt oxide for perpendicular magnetic recording medium with low media noise
US8488276B1 (en) 2008-09-30 2013-07-16 WD Media, LLC Perpendicular magnetic recording medium with grain isolation magnetic anistropy layer
US8993133B1 (en) * 2010-12-23 2015-03-31 WD Media, LLC Intermediate layer for perpendicular magnetic recording medium with high permeability grain boundaries
US9685184B1 (en) 2014-09-25 2017-06-20 WD Media, LLC NiFeX-based seed layer for magnetic recording media
US9990940B1 (en) 2014-12-30 2018-06-05 WD Media, LLC Seed structure for perpendicular magnetic recording media

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5536540B2 (ja) * 2010-05-26 2014-07-02 昭和電工株式会社 磁気記録媒体および磁気記録再生装置
US20120141832A1 (en) * 2010-12-03 2012-06-07 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording media having a decoupled low anisotropy oxide layer for writeability enhancement
US8559136B1 (en) 2012-11-14 2013-10-15 HGST Netherlands B.V. Hard amorphous carbon film containing ultratrace hydrogen for magnetic recording media and magnetic heads
US20140242419A1 (en) * 2013-02-28 2014-08-28 Showa Denko Hd Singapore Pte Ltd. Perpendicular recording medium for hard disk drives
US9564164B2 (en) * 2013-12-20 2017-02-07 Seagate Technology Llc Exchange decoupled data storage medium
US9129638B1 (en) * 2015-01-22 2015-09-08 HGST Netherlands B.V. High performance perpendicular magnetic granular media consisting of multiple exchange control layers
US9391266B1 (en) * 2015-03-26 2016-07-12 International Business Machines Corporation Perpendicular magnetic anisotropy BCC multilayers
JP6535612B2 (ja) 2016-01-29 2019-06-26 昭和電工株式会社 磁気記録媒体及び磁気記録再生装置
JP6767256B2 (ja) * 2016-12-21 2020-10-14 昭和電工株式会社 磁気記録媒体の製造方法
US10706883B2 (en) 2017-10-20 2020-07-07 Western Digital Technologies, Inc. Perpendicular recording media with carbon grain isolation initiation layer
US11600294B2 (en) 2018-04-20 2023-03-07 Western Digital Technologies, Inc. Magnetic media design with multiple non-magnetic exchange control layers and graded magnetic sublayers

Citations (4)

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JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体
JP2007250150A (ja) * 2006-03-20 2007-09-27 Fujitsu Ltd 垂直磁気記録媒体
JP2008243316A (ja) * 2007-03-28 2008-10-09 Fujitsu Ltd 磁気記録媒体及び磁気記録装置
WO2008132880A1 (ja) * 2007-04-19 2008-11-06 Fuji Electric Device Technology Co., Ltd. 垂直磁気記録媒体

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6627301B2 (en) 2000-03-28 2003-09-30 Showa Denko Kabushiki Kaisha Magnetic recording medium
JP4757400B2 (ja) 2001-05-09 2011-08-24 昭和電工株式会社 垂直磁気記録媒体、および磁気記録再生装置
JP4185391B2 (ja) 2003-04-07 2008-11-26 昭和電工株式会社 磁気記録媒体、その製造方法および磁気記録再生装置
US7470474B2 (en) * 2003-04-07 2008-12-30 Kabushiki Kaisha Toshiba Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus including both oxide and non-oxide perpendicular magnetic layers
US6939626B2 (en) 2003-07-24 2005-09-06 Hitachi Global Storage Technologies Netherlands B.V. Magnetic anisotropy adjusted laminated magnetic thin films for magnetic recording
JP4405436B2 (ja) 2005-06-13 2010-01-27 国立大学法人東北大学 負異方性交換結合型磁気記録媒体及び磁気記録再生装置
US8116035B2 (en) 2005-06-13 2012-02-14 Tohoku University Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus
JP2007035139A (ja) * 2005-07-26 2007-02-08 Hitachi Global Storage Technologies Netherlands Bv 垂直磁気記録媒体及び磁気記録再生装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体
JP2007250150A (ja) * 2006-03-20 2007-09-27 Fujitsu Ltd 垂直磁気記録媒体
JP2008243316A (ja) * 2007-03-28 2008-10-09 Fujitsu Ltd 磁気記録媒体及び磁気記録装置
WO2008132880A1 (ja) * 2007-04-19 2008-11-06 Fuji Electric Device Technology Co., Ltd. 垂直磁気記録媒体

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8394243B1 (en) 2008-07-24 2013-03-12 Wd Media, Inc. Sputtered cobalt oxide for perpendicular magnetic recording medium with low media noise
WO2010038448A1 (ja) * 2008-09-30 2010-04-08 Hoya株式会社 垂直磁気記録媒体
US8488276B1 (en) 2008-09-30 2013-07-16 WD Media, LLC Perpendicular magnetic recording medium with grain isolation magnetic anistropy layer
US8168310B2 (en) 2009-12-15 2012-05-01 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording media with oxide-containing exchange coupling layer
US20120186974A1 (en) * 2009-12-15 2012-07-26 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording media with oxide-containing exchange coupling layer
US8747628B2 (en) 2009-12-15 2014-06-10 HGST Netherlands B.V. Perpendicular magnetic recording media with oxide-containing exchange coupling layer
US8993133B1 (en) * 2010-12-23 2015-03-31 WD Media, LLC Intermediate layer for perpendicular magnetic recording medium with high permeability grain boundaries
US20120307395A1 (en) * 2011-05-31 2012-12-06 Hitachi Global Storage Technologies Netherlands B.V. PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH AN INVERTED Hk STRUCTURE
US9685184B1 (en) 2014-09-25 2017-06-20 WD Media, LLC NiFeX-based seed layer for magnetic recording media
US9990940B1 (en) 2014-12-30 2018-06-05 WD Media, LLC Seed structure for perpendicular magnetic recording media

Also Published As

Publication number Publication date
US20100247962A1 (en) 2010-09-30
JP2009087500A (ja) 2009-04-23
CN101816042A (zh) 2010-08-25
US8247094B2 (en) 2012-08-21

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