JP2005243220A - 多層下部層を有する反強磁性結合磁性層を備えた磁気記録ディスク - Google Patents
多層下部層を有する反強磁性結合磁性層を備えた磁気記録ディスク Download PDFInfo
- Publication number
- JP2005243220A JP2005243220A JP2005017820A JP2005017820A JP2005243220A JP 2005243220 A JP2005243220 A JP 2005243220A JP 2005017820 A JP2005017820 A JP 2005017820A JP 2005017820 A JP2005017820 A JP 2005017820A JP 2005243220 A JP2005243220 A JP 2005243220A
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- JP
- Japan
- Prior art keywords
- layer
- mrt
- ferromagnetic layer
- lower ferromagnetic
- antiferromagnetic coupling
- 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.)
- Withdrawn
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 43
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 92
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 230000005290 antiferromagnetic effect Effects 0.000 claims abstract description 34
- 230000005415 magnetization Effects 0.000 claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 20
- 239000000956 alloy Substances 0.000 claims description 20
- 239000011651 chromium Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 6
- 239000010948 rhodium Substances 0.000 claims description 6
- 229910052707 ruthenium Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052741 iridium Inorganic materials 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 11
- 230000007423 decrease Effects 0.000 abstract description 10
- 239000010410 layer Substances 0.000 description 148
- 239000002131 composite material Substances 0.000 description 12
- 125000006850 spacer group Chemical group 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910000684 Cobalt-chrome Inorganic materials 0.000 description 4
- 239000010952 cobalt-chrome Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000006249 magnetic particle Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007725 thermal activation Methods 0.000 description 2
- YTPMCWYIRHLEGM-BQYQJAHWSA-N 1-[(e)-2-propylsulfonylethenyl]sulfonylpropane Chemical compound CCCS(=O)(=O)\C=C\S(=O)(=O)CCC YTPMCWYIRHLEGM-BQYQJAHWSA-N 0.000 description 1
- 229910001149 41xx steel Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- -1 CrV Chemical compound 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910017709 Ni Co Inorganic materials 0.000 description 1
- 229910003267 Ni-Co Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910000943 NiAl Inorganic materials 0.000 description 1
- 229910003262 Ni‐Co Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 102000045222 parkin Human genes 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 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
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
-
- 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
-
- 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
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
- Hall/Mr Elements (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/788,687 US7125616B2 (en) | 2004-02-26 | 2004-02-26 | Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple lower layers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005243220A true JP2005243220A (ja) | 2005-09-08 |
| JP2005243220A5 JP2005243220A5 (enExample) | 2008-02-28 |
Family
ID=34750535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005017820A Withdrawn JP2005243220A (ja) | 2004-02-26 | 2005-01-26 | 多層下部層を有する反強磁性結合磁性層を備えた磁気記録ディスク |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7125616B2 (enExample) |
| EP (1) | EP1569207B1 (enExample) |
| JP (1) | JP2005243220A (enExample) |
| KR (1) | KR20060043112A (enExample) |
| CN (1) | CN100338656C (enExample) |
| DE (1) | DE602004015563D1 (enExample) |
| SG (1) | SG114744A1 (enExample) |
| TW (1) | TW200531037A (enExample) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7081309B2 (en) * | 2004-03-23 | 2006-07-25 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic recording disk with antiferromagnetically-coupled magnetic layer having multiple ferromagnetically-coupled lower layers |
| US20060210834A1 (en) * | 2005-03-18 | 2006-09-21 | Do Hoa V | Laminated magnetic thin films with sublayers for magnetic recording |
| JP2007004907A (ja) * | 2005-06-24 | 2007-01-11 | Hitachi Global Storage Technologies Netherlands Bv | 磁気記録媒体 |
| JP2007257679A (ja) * | 2006-03-20 | 2007-10-04 | Fujitsu Ltd | 磁気記録媒体、その製造方法、および磁気記憶装置 |
| JP2007317304A (ja) * | 2006-05-25 | 2007-12-06 | Fujitsu Ltd | 磁気記録媒体および磁気記憶装置 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60014974T2 (de) | 1999-06-08 | 2005-03-17 | Fujitsu Ltd., Kawasaki | Magnetisches Aufzeichnungsmittel |
| US6602612B2 (en) * | 1999-06-08 | 2003-08-05 | Fujitsu Limited | Magnetic recording medium and magnetic storage apparatus |
| US6773834B2 (en) | 1999-10-08 | 2004-08-10 | Hitachi Global Storage Technologies Netherlands B.V. | Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate |
| US6280813B1 (en) * | 1999-10-08 | 2001-08-28 | International Business Machines Corporation | Magnetic recording media with antiferromagnetically coupled ferromagnetic films as the recording layer |
| US6835475B2 (en) * | 2001-07-26 | 2004-12-28 | Hitachi Global Storage Technologies Netherlands B.V. | Dual-layer perpendicular magnetic recording media with laminated underlayer formed with antiferromagnetically coupled films |
| SG96659A1 (en) * | 2001-11-08 | 2003-06-16 | Inst Data Storage | Laminated antiferromagnetically coupled media for data storage |
| JP2003263714A (ja) | 2002-03-06 | 2003-09-19 | Fujitsu Ltd | 磁気記録媒体及び磁気記憶装置 |
| US6893748B2 (en) * | 2003-05-20 | 2005-05-17 | Komag, Inc. | Soft magnetic film for perpendicular recording disk |
-
2004
- 2004-02-26 US US10/788,687 patent/US7125616B2/en not_active Expired - Fee Related
- 2004-10-12 EP EP04256293A patent/EP1569207B1/en not_active Expired - Lifetime
- 2004-10-12 DE DE602004015563T patent/DE602004015563D1/de not_active Expired - Fee Related
- 2004-12-13 TW TW093138646A patent/TW200531037A/zh unknown
-
2005
- 2005-01-26 JP JP2005017820A patent/JP2005243220A/ja not_active Withdrawn
- 2005-02-01 CN CNB2005100064428A patent/CN100338656C/zh not_active Expired - Fee Related
- 2005-02-22 SG SG200501003A patent/SG114744A1/en unknown
- 2005-02-23 KR KR1020050014836A patent/KR20060043112A/ko not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN1661686A (zh) | 2005-08-31 |
| KR20060043112A (ko) | 2006-05-15 |
| SG114744A1 (en) | 2005-09-28 |
| DE602004015563D1 (de) | 2008-09-18 |
| US7125616B2 (en) | 2006-10-24 |
| US20050190498A1 (en) | 2005-09-01 |
| CN100338656C (zh) | 2007-09-19 |
| EP1569207A1 (en) | 2005-08-31 |
| TW200531037A (en) | 2005-09-16 |
| EP1569207B1 (en) | 2008-08-06 |
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| US6773834B2 (en) | Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20071225 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20071225 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20071225 |
|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20090511 |