JP3965186B2 - 垂直磁気記録媒体 - Google Patents
垂直磁気記録媒体 Download PDFInfo
- Publication number
- JP3965186B2 JP3965186B2 JP2004544703A JP2004544703A JP3965186B2 JP 3965186 B2 JP3965186 B2 JP 3965186B2 JP 2004544703 A JP2004544703 A JP 2004544703A JP 2004544703 A JP2004544703 A JP 2004544703A JP 3965186 B2 JP3965186 B2 JP 3965186B2
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- Prior art keywords
- magnetic
- layer
- recording medium
- auxiliary
- magnetic layer
- 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.)
- Expired - Fee Related
Links
- 230000005415 magnetization Effects 0.000 claims description 35
- 239000000758 substrate Substances 0.000 claims description 34
- 230000004907 flux Effects 0.000 claims description 16
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000010408 film Substances 0.000 description 70
- 238000000034 method Methods 0.000 description 9
- 239000000725 suspension Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000010702 perfluoropolyether Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Images
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
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0026—Pulse recording
- G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface
-
- 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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
- Y10T428/24975—No layer or component greater than 5 mils thick
Landscapes
- Magnetic Record Carriers (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Thin Magnetic Films (AREA)
Description
Claims (9)
- 基板と、基板の表面に直交する垂直方向に磁化容易軸を有する記録磁性層と、表面で記録磁性層を受け止め、前記垂直方向に沿って磁化容易軸を有し、記録磁性層の保磁力よりも小さい保磁力を有する補助磁性層とを備え、補助磁性層の膜厚と残留磁束密度との積は記録磁性層の膜厚と残留磁束密度との積の5分の1以下に設定されることを特徴とする垂直磁気記録媒体。
- 請求項1に記載の垂直磁気記録媒体において、前記補助磁性層は、少なくともCoを含む磁性膜と、少なくともPt、Pd、AuおよびAgのいずれかを含む非磁性膜との積層体で構成されることを特徴とする垂直磁気記録媒体。
- 請求項1に記載の垂直磁気記録媒体において、表面で前記補助磁性層を受け止め、基板の面内方向に磁化容易軸を有する軟磁性の裏打ち層をさらに備えることを特徴とする垂直磁気記録媒体。
- 請求項3に記載の垂直磁気記録媒体において、前記補助磁性層は、少なくともCoを含む磁性膜と、少なくともPt、Pd、AuおよびAgのいずれかを含む非磁性膜との積層体で構成されることを特徴とする垂直磁気記録媒体。
- 請求項1に記載の垂直磁気記録媒体において、前記補助磁性層の膜厚は5nm以下の値に設定されることを特徴とする垂直磁気記録媒体。
- 請求項1に記載の垂直磁気記録媒体において、表面で前記補助磁性層を受け止める非磁性層と、表面で非磁性層を受け止め、基板の面内方向に磁化容易軸を有する軟磁性の裏打ち層とをさらに備えることを特徴とする垂直磁気記録媒体。
- 請求項6に記載の垂直磁気記録媒体において、前記補助磁性層は、少なくともCoを含む磁性膜と、少なくともPt、Pd、AuおよびAgのいずれかを含む非磁性膜との積層体で構成されることを特徴とする垂直磁気記録媒体。
- 請求項6に記載の垂直磁気記録媒体において、前記補助磁性層の膜厚は5nm以下の値に設定されることを特徴とする垂直磁気記録媒体。
- 請求項6に記載の垂直磁気記録媒体において、前記非磁性層の膜厚は5nm以下の値に設定されることを特徴とする垂直磁気記録媒体。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/010779 WO2004036556A1 (ja) | 2002-10-17 | 2002-10-17 | 垂直磁気記録媒体 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2004036556A1 JPWO2004036556A1 (ja) | 2006-02-16 |
JP3965186B2 true JP3965186B2 (ja) | 2007-08-29 |
Family
ID=32104828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004544703A Expired - Fee Related JP3965186B2 (ja) | 2002-10-17 | 2002-10-17 | 垂直磁気記録媒体 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7402348B2 (ja) |
EP (1) | EP1555655B1 (ja) |
JP (1) | JP3965186B2 (ja) |
CN (1) | CN100385508C (ja) |
AU (1) | AU2002335516A1 (ja) |
DE (1) | DE60224733T2 (ja) |
WO (1) | WO2004036556A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7498092B2 (en) * | 2005-01-26 | 2009-03-03 | Hitachi Global Storage Technologies Netherlands B.V. | Perpendicular magnetic recording medium with magnetic torque layer coupled to the perpendicular recording layer |
JP2008140460A (ja) * | 2006-11-30 | 2008-06-19 | Toshiba Corp | 垂直磁気記録媒体及び磁気記録再生装置 |
JP2009187608A (ja) * | 2008-02-05 | 2009-08-20 | Toshiba Corp | 垂直磁気記録パターンド媒体および磁気記録再生装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4966821A (en) * | 1986-07-17 | 1990-10-30 | Ricoh Company, Ltd. | Perpendicular magnetic recording medium |
JP2524514B2 (ja) * | 1987-09-21 | 1996-08-14 | 日立マクセル株式会社 | 磁気記録媒体 |
JPH0528454A (ja) | 1991-07-24 | 1993-02-05 | Sony Corp | 垂直磁気記録媒体 |
JP3670728B2 (ja) | 1995-09-25 | 2005-07-13 | 株式会社日立製作所 | 磁気記録媒体およびこれを応用した磁気記録装置 |
TW390998B (en) | 1996-05-20 | 2000-05-21 | Hitachi Ltd | Magnetic recording media and magnetic recording system using the same |
WO1998006093A1 (fr) * | 1996-05-20 | 1998-02-12 | Hitachi, Ltd. | Support d'enregistrement magnetique et dispositif de memoire magnetique utilisant un tel support |
JPH10228620A (ja) * | 1997-02-14 | 1998-08-25 | Nec Corp | 垂直磁気記録媒体 |
JPH10334440A (ja) * | 1997-06-03 | 1998-12-18 | Hitachi Ltd | 磁気記録媒体及び磁気記録再生装置 |
JPH11102510A (ja) | 1997-09-30 | 1999-04-13 | Hitachi Ltd | 垂直磁気記録媒体およびこれを用いた磁気記録装置 |
US6403203B2 (en) * | 1997-05-29 | 2002-06-11 | Hitachi, Ltd. | Magnetic recording medium and magnetic recording apparatus using the same |
JP3740291B2 (ja) | 1998-08-24 | 2006-02-01 | 日本オプネクスト株式会社 | 光送信器 |
US6893746B1 (en) * | 1999-10-29 | 2005-05-17 | Hitachi Maxell, Ltd. | Magnetic recording medium with high thermal stability, method for producing the same, and magnetic recording apparatus |
JP2002025032A (ja) | 2000-06-30 | 2002-01-25 | Sony Corp | 磁気記録媒体 |
JP2002100030A (ja) * | 2000-09-21 | 2002-04-05 | Toshiba Corp | 垂直磁気記録媒体 |
JP4025013B2 (ja) | 2000-12-26 | 2007-12-19 | 株式会社東芝 | 垂直磁気記録方式の磁気ディスク装置 |
JP2002216333A (ja) | 2001-01-22 | 2002-08-02 | Hitachi Maxell Ltd | 磁気記録媒体及び磁気記録装置 |
JP2002222517A (ja) | 2001-01-25 | 2002-08-09 | Sony Corp | 磁気記録媒体 |
JP2002312918A (ja) * | 2001-04-13 | 2002-10-25 | Fujitsu Ltd | 磁気記録媒体 |
JP3905424B2 (ja) * | 2002-06-06 | 2007-04-18 | 富士通株式会社 | 垂直磁気記録媒体及びこれを備えた磁気記録装置 |
-
2002
- 2002-10-17 JP JP2004544703A patent/JP3965186B2/ja not_active Expired - Fee Related
- 2002-10-17 EP EP02808023A patent/EP1555655B1/en not_active Expired - Fee Related
- 2002-10-17 AU AU2002335516A patent/AU2002335516A1/en not_active Abandoned
- 2002-10-17 CN CNB028297636A patent/CN100385508C/zh not_active Expired - Fee Related
- 2002-10-17 WO PCT/JP2002/010779 patent/WO2004036556A1/ja active IP Right Grant
- 2002-10-17 DE DE60224733T patent/DE60224733T2/de not_active Expired - Fee Related
-
2005
- 2005-03-23 US US11/088,241 patent/US7402348B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE60224733D1 (de) | 2008-03-06 |
US20050249982A1 (en) | 2005-11-10 |
CN100385508C (zh) | 2008-04-30 |
CN1689079A (zh) | 2005-10-26 |
AU2002335516A1 (en) | 2004-05-04 |
US7402348B2 (en) | 2008-07-22 |
WO2004036556A1 (ja) | 2004-04-29 |
EP1555655A1 (en) | 2005-07-20 |
EP1555655A4 (en) | 2006-02-08 |
JPWO2004036556A1 (ja) | 2006-02-16 |
EP1555655B1 (en) | 2008-01-16 |
DE60224733T2 (de) | 2009-01-15 |
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