JP6803045B2 - 磁気記録媒体および磁気記憶装置 - Google Patents
磁気記録媒体および磁気記憶装置 Download PDFInfo
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- JP6803045B2 JP6803045B2 JP2017113605A JP2017113605A JP6803045B2 JP 6803045 B2 JP6803045 B2 JP 6803045B2 JP 2017113605 A JP2017113605 A JP 2017113605A JP 2017113605 A JP2017113605 A JP 2017113605A JP 6803045 B2 JP6803045 B2 JP 6803045B2
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- 230000005291 magnetic effect Effects 0.000 title claims description 170
- 239000013078 crystal Substances 0.000 claims description 63
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 230000004888 barrier function Effects 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 21
- 239000002244 precipitate Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052732 germanium Inorganic materials 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 238000004033 diameter control Methods 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 229910052716 thallium Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 155
- 239000006249 magnetic particle Substances 0.000 description 37
- 229910005335 FePt Inorganic materials 0.000 description 34
- 239000000463 material Substances 0.000 description 24
- 239000010408 film Substances 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910018979 CoPt Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000010702 perfluoropolyether Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910001149 41xx steel Inorganic materials 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910005435 FeTaN Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910000943 NiAl Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- -1 Ta 2 O 5 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 230000005290 antiferromagnetic effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052725 zinc 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
- G11B5/667—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers including a soft magnetic 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
- G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
- G11B5/737—Physical structure of underlayer, e.g. texture
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4866—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives the arm comprising an optical waveguide, e.g. for thermally-assisted recording
-
- 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
- G11B5/653—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Fe or Ni
-
- 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
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/60—Fluid-dynamic spacing of heads from record-carriers
- G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
- G11B5/6088—Optical waveguide in or on flying head
Description
(1)基板、バリア層、結晶粒径制御層、L10型結晶構造を有し、面方位が(001)である合金を含む磁性層をこの順で有し、前記バリア層は、酸化物、窒化物または炭化物を含み、前記結晶粒径制御層は、Agを含む結晶質の層であり、平均厚さが0.1nm〜1nmの範囲内であり、前記バリア層は、前記結晶粒径制御層と接していることを特徴とする磁気記録媒体。
(2)前記結晶粒径制御層は、Agを含む結晶質の点状析出物を有することを特徴とする(1)に記載の磁気記録媒体。
(3)前記結晶粒径制御層が、B、C、Si、Ge、Cu、Ni、Tl、Sn、BN、MgOからなる群から選択される1種以上をさらに含むことを特徴とする(1)または(2)に記載の磁気記録媒体。
(4)前記結晶粒径制御層が、酸化物をさらに含むことを特徴とする(1)〜(3)の何れか1項に記載の磁気記録媒体。
(5)前記結晶粒径制御層が、Agを40mol%〜95mol%の範囲内で含むことを特徴とする(1)〜(4)の何れか1項に記載の磁気記録媒体。
(6)前記バリア層は、MgO、TiO、NiO、TiN、TaN、HfN、NbN、ZrC、HfC、TaC、NbC、TiCからなる群から選択される1種以上を40mol%以上含み、NaCl型構造を有することを特徴とする(1)〜(5)のいずれか1項に記載の磁気記録媒体。
(7)(1)〜(6)のいずれか1項に記載の磁気記録媒体を含むことを特徴とする磁気記憶装置。
図1に、本実施形態の磁気記録媒体の一例を示す。
本実施形態の磁気記憶装置の構成例について説明する。
磁気記録媒体100(図1参照)を作製した。以下に、磁気記録媒体100の製造工程を説明する。なお、下地層7は、第1の下地層、第2の下地層および第3の下地層がこの順で積層されている。
結晶粒径制御層3の平均厚さを、それぞれ0.5nm、0.2nm、0.1nmに変更した以外は、実施例1と同様にして、磁気記録媒体100を作製した。
結晶粒径制御層3を設けなかった以外は、実施例1と同様にして、磁気記録媒体を作製した。
結晶粒径制御層3の平均厚さを、それぞれ0.05nm、2nmに変更した以外は、実施例1と同様にして、磁気記録媒体を作製した。
結晶粒径制御層3を構成する材料を、Ag−2Ge(Agの含有量98at%、Geの含有量2at%)に変更した以外は、実施例1と同様にして、磁気記録媒体100を作製した。
Geの含有量を、それぞれ5at%、10at%、20at%、30at%、50at%、60at%、70at%に変更した以外は、実施例5と同様にして、磁気記録媒体100を作製した。
結晶粒径制御層3を構成する材料を、それぞれAg−20B、Ag−20C、Ag−20(BN)、Ag−10Cu、Ag−50Si、Ag−50Ni、Ag−50Tl、Ag−50Sn、Ag−20(MgO)に変更した以外は、実施例1と同様にして、磁気記録媒体100を作製した。
結晶粒径制御層3を構成する材料を、Cuに変更した以外は、実施例1と同様にして、磁気記録媒体を作製した。
結晶粒径制御層3として、平均膜厚5nmのAg−20(SiO2)膜を形成した以外は、実施例1と同様にして、磁気記録媒体を作製した。
結晶粒径制御層3として、平均膜厚5nmのAg−20Cu膜を形成した以外は、実施例1と同様にして、磁気記録媒体を作製した。
SEM(日立ハイテクノロジーズ社製)を用いて、FePt磁性粒子の平均粒径を測定した。
X線回折装置(Philips社製)を用いて、磁性層4まで形成した磁気記録媒体の中間サンプルのX線回折スペクトルを測定し、FePt(200)ピークの半値幅を求めた。
2 バリア層
3 結晶粒径制御層
4 磁性層
41 磁性粒子
42 粒界部
5 炭素保護層
6 潤滑層
7 下地層
100 磁気記録媒体
101 磁気記録媒体駆動部
102 磁気ヘッド
103 磁気ヘッド駆動部
104 記録再生信号処理系
201 主磁極
202 補助磁極
203 コイル
204 レーザーダイオード
205 レーザー光
206 近接場光発生素子
207 導波路
208 記録ヘッド
209 シールド
210 再生素子
211 再生ヘッド
212 磁気記録媒体
Claims (6)
- 基板、バリア層、結晶粒径制御層、L10型結晶構造を有し、面方位が(001)である合金を含む磁性層をこの順で有し、
前記バリア層は、酸化物、窒化物または炭化物を含み、
前記結晶粒径制御層は、Agを含む結晶質の層であり、平均厚さが0.1nm〜1nmの範囲内であり、
前記バリア層は、前記結晶粒径制御層と接していることを特徴とする磁気記録媒体。 - 前記結晶粒径制御層は、Agを含む結晶質の点状析出物を有することを特徴とする請求項1に記載の磁気記録媒体。
- 前記結晶粒径制御層が、B、C、Si、Ge、Cu、Ni、Tl、Sn、BN、MgOからなる群から選択される1種以上の物質をさらに含むことを特徴とする請求項1または2に記載の磁気記録媒体。
- 前記結晶粒径制御層が、前記物質を5mol%〜60mol%の範囲内で含むことを特徴とする請求項3に記載の磁気記録媒体。
- 前記バリア層は、MgO、TiO、NiO、TiN、TaN、HfN、NbN、ZrC、HfC、TaC、NbC、TiCからなる群から選択される1種以上を40mol%以上含み、NaCl型構造を有することを特徴とする請求項1〜4のいずれか1項に記載の磁気記録媒体。
- 請求項1〜5のいずれか1項に記載の磁気記録媒体を含むことを特徴とする磁気記憶装置。
Priority Applications (3)
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JP2017113605A JP6803045B2 (ja) | 2017-06-08 | 2017-06-08 | 磁気記録媒体および磁気記憶装置 |
US15/979,965 US10283154B2 (en) | 2017-06-08 | 2018-05-15 | Magnetic recording medium and magnetic storage apparatus |
CN201810521202.9A CN109036474B (zh) | 2017-06-08 | 2018-05-28 | 磁记录介质和磁存储装置 |
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2018
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JP2018206457A (ja) | 2018-12-27 |
US20180358041A1 (en) | 2018-12-13 |
CN109036474A (zh) | 2018-12-18 |
US10283154B2 (en) | 2019-05-07 |
CN109036474B (zh) | 2020-01-03 |
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