JP6260742B2 - 磁気記録媒体 - Google Patents
磁気記録媒体 Download PDFInfo
- Publication number
- JP6260742B2 JP6260742B2 JP2017526175A JP2017526175A JP6260742B2 JP 6260742 B2 JP6260742 B2 JP 6260742B2 JP 2017526175 A JP2017526175 A JP 2017526175A JP 2017526175 A JP2017526175 A JP 2017526175A JP 6260742 B2 JP6260742 B2 JP 6260742B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- magnetic
- fept
- magnetic recording
- 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.)
- Active
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 303
- 239000000956 alloy Substances 0.000 claims description 48
- 229910045601 alloy Inorganic materials 0.000 claims description 47
- 239000000758 substrate Substances 0.000 claims description 33
- 239000013078 crystal Substances 0.000 claims description 27
- 229910005335 FePt Inorganic materials 0.000 claims 1
- 239000010410 layer Substances 0.000 description 281
- 239000000463 material Substances 0.000 description 31
- 239000010408 film Substances 0.000 description 18
- 239000011241 protective layer Substances 0.000 description 14
- 238000004544 sputter deposition Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 230000005415 magnetization Effects 0.000 description 12
- 230000008878 coupling Effects 0.000 description 11
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 238000001755 magnetron sputter deposition Methods 0.000 description 10
- 239000000470 constituent Substances 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004088 simulation Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 230000005290 antiferromagnetic effect Effects 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000005316 antiferromagnetic exchange Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 241000511976 Hoya Species 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005292 diamagnetic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910000521 B alloy Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910019233 CoFeNi Inorganic materials 0.000 description 1
- 229910018936 CoPd Inorganic materials 0.000 description 1
- 229910018979 CoPt Inorganic materials 0.000 description 1
- 229910015187 FePd Inorganic materials 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000005345 chemically strengthened glass Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000013080 microcrystalline material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- G11B5/672—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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
-
- 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
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/0021—Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
Landscapes
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Description
本実施例では、基板と、第1磁性層及び第2磁性層からなる磁気記録層を含む磁気記録媒体に対して、磁化反転に必要な磁場強度(反転磁界)と、室温での熱安定性を評価した。2層媒体の反転磁界、及び熱安定性には、各層のMs,Hk,交換結合定数、容易軸分散等が関わり、さらに熱アシスト媒体の場合には、それらの温度依存性が加わるため、解析的な計算により見積もることは難しい。そのため、マイクロマグネティックシミュレーションを使用した。なお、反転磁界は、書き込み性を示す物理量でもある。
但し、Ku:磁気異方性定数
V: 磁性微粒子1個の体積
k: ボルツマン定数
T: 絶対温度
本実施例は、第1磁性層にFePt−C(2nm)を成膜し、第2磁性層にFePt−Rh(3nm)、又は、FePt(3nm)を成膜した磁気記録媒体を作成し、室温(RT)での飽和磁化(Ms)及び保磁力(Hc)と、450Kでの保磁力(Hc)及び300Kでの熱安定性を測定した。
次に、MgOシード層40を形成した積層体を450℃に加熱し、圧力1.5PaのArガス中でFePt−Cターゲットを用いたDCマグネトロンスパッタ法により、60vol%Fe50Pt50−40vol%CからなるFePt−C層を形成した。FePt−C層の膜厚は2nmであった。FePt−C層を形成する時のターゲットに印加した電力は、300Wであった。FePt−Cからなる層の各元素の含有量を第3表に記載した。FePt−C層は、FePtと磁性結晶粒とし、C(カーボン)を非磁性粒界材料とするグラニュラー構造を有している。
第2磁性層として、FePtRhからなる層(実施例2)またはFePtからなる層(比較例)を形成した。FePtRhからなる層は、MgOシード層40を形成した積層体を450℃に加熱し、圧力1.5PaのArガス中でFePtRhターゲットを用いたDCマグネトロンスパッタ法により、成膜した。FePtRhからなる層を形成する時のターゲットに印加した電力は、300Wであった。また、FePtからなる層は、上記FePtRhからなる層と同様にして、FePtターゲットを用いたDCマグネトロンスパッタ法により成膜した。FePtからなる層を形成する時のターゲットに印加した電力は、300Wであった。FePtRhからなる層及びFePtからなる層の膜厚は3nmであった。FePtRhからなる層、または、FePtからなる層の各元素の含有量を第3表に記載した。
20 密着層
30 下地層
40 シード層
50 磁気記録層
52 第1磁性層
54 第2磁性層
60 保護層
Claims (3)
- 基板と、第1磁性層及び第2磁性層を含む磁気記録層とを含む磁気記録媒体であって、
前記第2磁性層は、FePtRh規則合金を含み、
前記第1磁性層及び前記第2磁性層は、基板側に第1磁性層が形成され、第1磁性層の上層に第2磁性層が形成されており、
前記第1磁性層は、その室温における磁気異方性定数(Ku)が、第2磁性層の室温におけるKuよりも大きいことを特徴とする磁気記録媒体。 - 前記第1磁性層は、FePt規則合金を含むことを特徴とする請求項1に記載の磁気記録媒体。
- 前記第1磁性層及び第2磁性層は、磁性結晶粒と、該磁性結晶粒を取り囲む非磁性結晶粒界とを含むグラニュラー構造を有することを特徴とする請求項1又は2に記載の磁気記録媒体。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015133885 | 2015-07-02 | ||
JP2015133885 | 2015-07-02 | ||
PCT/JP2016/003068 WO2017002348A1 (ja) | 2015-07-02 | 2016-06-24 | 磁気記録媒体 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2017002348A1 JPWO2017002348A1 (ja) | 2017-11-24 |
JP6260742B2 true JP6260742B2 (ja) | 2018-01-17 |
Family
ID=57608318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2017526175A Active JP6260742B2 (ja) | 2015-07-02 | 2016-06-24 | 磁気記録媒体 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10304485B2 (ja) |
JP (1) | JP6260742B2 (ja) |
CN (1) | CN107112031B (ja) |
MY (1) | MY166441A (ja) |
SG (1) | SG11201705364QA (ja) |
WO (1) | WO2017002348A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY181706A (en) | 2015-08-24 | 2021-01-04 | Fuji Electric Co Ltd | Magnetic recording medium |
JP7041876B2 (ja) * | 2018-04-18 | 2022-03-25 | 富士電機株式会社 | 磁気異方性評価装置、磁気異方性評価方法および演算機構 |
JP7041597B2 (ja) * | 2018-06-29 | 2022-03-24 | 昭和電工株式会社 | 熱アシスト磁気記録媒体および磁気記憶装置 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020192506A1 (en) * | 2001-06-04 | 2002-12-19 | International Business Machines Corporation | `Thermal Spring' magnetic recording media for writing using magnetic and thermal gradients |
US20030108721A1 (en) * | 2001-12-11 | 2003-06-12 | Fullerton Eric E. | Thermally - assisted magnetic recording disk with recording layer exchange- coupled to antiferromagnetic-to-ferromagnetic switching layer |
JP4207769B2 (ja) * | 2002-12-20 | 2009-01-14 | 富士電機デバイステクノロジー株式会社 | 垂直磁気記録媒体およびその製造方法 |
JPWO2006049259A1 (ja) | 2004-11-04 | 2008-05-29 | Tdk株式会社 | パターンド磁気記録媒体の設計方法およびパターンド磁気記録媒体 |
US8241766B2 (en) * | 2006-01-20 | 2012-08-14 | Seagate Technology Llc | Laminated exchange coupling adhesion (LECA) media for heat assisted magnetic recording |
US7678476B2 (en) * | 2006-01-20 | 2010-03-16 | Seagate Technology Llc | Composite heat assisted magnetic recording media with temperature tuned intergranular exchange |
JP5013100B2 (ja) | 2007-12-21 | 2012-08-29 | 国立大学法人秋田大学 | 磁気記録媒体及びその製造方法ならびに磁気ディスク装置 |
JP2012048784A (ja) * | 2010-08-26 | 2012-03-08 | Hitachi Ltd | 垂直磁気記録媒体及びその製造方法 |
JP5346348B2 (ja) * | 2011-02-23 | 2013-11-20 | 株式会社日立製作所 | 磁気記録媒体、磁気記録装置 |
JP5804591B2 (ja) * | 2011-04-14 | 2015-11-04 | 昭和電工株式会社 | 熱アシスト磁気記録媒体及び磁気記憶装置 |
SG11201405518YA (en) * | 2012-03-22 | 2014-11-27 | Fuji Electric Co Ltd | Magnetic recording medium for heat-assisted magnetic recording |
CN104718574B (zh) * | 2012-12-06 | 2018-03-30 | 富士电机株式会社 | 垂直磁记录介质 |
JP6042781B2 (ja) | 2013-08-21 | 2016-12-14 | デクセリアルズ株式会社 | 潤滑剤及び磁気記録媒体 |
JP6245708B2 (ja) * | 2013-09-12 | 2017-12-13 | 国立研究開発法人物質・材料研究機構 | 垂直磁気記録媒体およびその製造方法 |
US9324353B2 (en) * | 2013-11-19 | 2016-04-26 | HGST Netherlands B.V. | Dual segregant heat assisted magnetic recording (HAMR) media |
US9280996B2 (en) * | 2013-12-13 | 2016-03-08 | HGST Netherlands B.V. | All-optical magnetic recording system using FeMnPt media |
SG11201602850SA (en) * | 2014-04-03 | 2016-05-30 | Fuji Electric Co Ltd | Magnetic recording medium |
US9940962B2 (en) * | 2014-08-29 | 2018-04-10 | Seagate Technology Llc | Low power thermally assisted data recording media |
WO2017002316A1 (ja) * | 2015-07-02 | 2017-01-05 | 富士電機株式会社 | 磁気記録媒体の製造方法及びその製造方法により製造される磁気記録媒体 |
MY181706A (en) * | 2015-08-24 | 2021-01-04 | Fuji Electric Co Ltd | Magnetic recording medium |
CN107533852B (zh) * | 2015-09-17 | 2019-10-01 | 富士电机株式会社 | 垂直磁记录介质 |
US9984709B1 (en) * | 2017-03-22 | 2018-05-29 | Seagate Technology Llc | Heat assisted magnetic recording (HAMR) media with thermal exchange control layer of lower curie temperature |
-
2016
- 2016-06-24 MY MYPI2017702399A patent/MY166441A/en unknown
- 2016-06-24 WO PCT/JP2016/003068 patent/WO2017002348A1/ja active Application Filing
- 2016-06-24 CN CN201680004848.9A patent/CN107112031B/zh active Active
- 2016-06-24 JP JP2017526175A patent/JP6260742B2/ja active Active
- 2016-06-24 SG SG11201705364QA patent/SG11201705364QA/en unknown
-
2017
- 2017-07-03 US US15/640,809 patent/US10304485B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107112031B (zh) | 2018-11-02 |
US10304485B2 (en) | 2019-05-28 |
US20170301367A1 (en) | 2017-10-19 |
CN107112031A (zh) | 2017-08-29 |
JPWO2017002348A1 (ja) | 2017-11-24 |
MY166441A (en) | 2018-06-27 |
SG11201705364QA (en) | 2017-08-30 |
WO2017002348A1 (ja) | 2017-01-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6274305B2 (ja) | 磁気記録媒体 | |
JP5892213B2 (ja) | 磁気記録方法 | |
CN104303230B (zh) | 磁记录介质和磁记录再生装置 | |
US10714138B2 (en) | Perpendicular magnetic recording medium | |
JPWO2006003922A1 (ja) | 垂直磁気記録ディスク及びその製造方法 | |
JP5999290B2 (ja) | 磁気記録媒体 | |
WO2014087665A1 (ja) | 垂直磁気記録媒体 | |
CN105745707A (zh) | 垂直磁记录介质 | |
JP6260742B2 (ja) | 磁気記録媒体 | |
JP6358640B2 (ja) | 磁気記録媒体 | |
JP6406462B2 (ja) | 磁気記録媒体 | |
JP6327357B2 (ja) | 磁気記録媒体 | |
WO2017221573A1 (ja) | 磁気記録媒体 | |
JP6416041B2 (ja) | 垂直磁気記録媒体及び磁気記録再生装置 | |
JP6428943B2 (ja) | 磁気記録媒体 | |
WO2016024378A1 (ja) | 磁気記録媒体の製造方法 | |
JP6260517B2 (ja) | 磁気記録媒体およびその製造方法 | |
JP5294062B2 (ja) | 磁気記録媒体 | |
US10388315B2 (en) | Perpendicular magnetic recording medium | |
JP2004213833A (ja) | 磁気記録媒体およびその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20170627 |
|
A871 | Explanation of circumstances concerning accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A871 Effective date: 20170627 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20170628 |
|
A975 | Report on accelerated examination |
Free format text: JAPANESE INTERMEDIATE CODE: A971005 Effective date: 20170726 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170905 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20171102 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20171114 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20171127 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 6260742 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |