JP6260517B2 - 磁気記録媒体およびその製造方法 - Google Patents
磁気記録媒体およびその製造方法 Download PDFInfo
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- JP6260517B2 JP6260517B2 JP2014235894A JP2014235894A JP6260517B2 JP 6260517 B2 JP6260517 B2 JP 6260517B2 JP 2014235894 A JP2014235894 A JP 2014235894A JP 2014235894 A JP2014235894 A JP 2014235894A JP 6260517 B2 JP6260517 B2 JP 6260517B2
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- 230000005291 magnetic effect Effects 0.000 title claims description 215
- 238000000034 method Methods 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000013078 crystal Substances 0.000 claims description 81
- 239000000956 alloy Substances 0.000 claims description 72
- 229910045601 alloy Inorganic materials 0.000 claims description 70
- 239000000758 substrate Substances 0.000 claims description 28
- 238000004544 sputter deposition Methods 0.000 claims description 19
- 229910005335 FePt Inorganic materials 0.000 claims description 17
- 238000000151 deposition Methods 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910052797 bismuth Inorganic materials 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052741 iridium Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 264
- 239000010408 film Substances 0.000 description 42
- 239000000463 material Substances 0.000 description 23
- 125000004429 atom Chemical group 0.000 description 18
- 230000034655 secondary growth Effects 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011241 protective layer Substances 0.000 description 12
- 239000004094 surface-active agent Substances 0.000 description 11
- 239000000470 constituent Substances 0.000 description 9
- 239000000696 magnetic material Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 230000005415 magnetization Effects 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 238000001755 magnetron sputter deposition Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000012010 growth Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000007885 magnetic separation Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 229910018936 CoPd Inorganic materials 0.000 description 2
- 229910018979 CoPt Inorganic materials 0.000 description 2
- 229910015187 FePd Inorganic materials 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000314 poly p-methyl styrene Polymers 0.000 description 2
- 206010063401 primary progressive multiple sclerosis Diseases 0.000 description 2
- 230000008707 rearrangement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 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
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910019233 CoFeNi Inorganic materials 0.000 description 1
- -1 CoNiP Inorganic materials 0.000 description 1
- 241000511976 Hoya Species 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
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052796 boron Inorganic materials 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
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001941 electron spectroscopy Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000314 lubricant 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
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 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
- 238000004528 spin coating Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000011800 void material Substances 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/18—Metallic material, boron or silicon on other inorganic substrates
- C23C14/185—Metallic material, boron or silicon on other inorganic substrates by cathodic sputtering
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
-
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/851—Coating a support with a magnetic layer by sputtering
Description
平滑な表面を有する化学強化ガラス基板(HOYA社製N−10ガラス基板)を洗浄し、基板10を準備した。洗浄後の基板10を、インライン式のスパッタ装置内に導入した。圧力0.5PaのArガス中で純Taターゲットを用いたDCマグネトロンスパッタ法により、膜厚5nmのTa密着層20を形成した。Ta密着層形成時の基板温度は室温(25℃)であった。Ta密着層形成時のスパッタ電力は100Wであった。
下層51を形成せず、上層52の膜厚を第1表に記載のように変更したことを除いて、実施例1〜6と同様の手順を用いて、磁気記録媒体を得た。実施例1〜6と同様の手順を用いて、磁気記録媒体の特性を評価した。測定結果を第2表に示す。
下層51の膜厚を0.5nm(実施例7)または1.5nm(実施例8)に変更したことを除いて実施例1と同様の手順を用いて、磁気記録媒体を得た。下層51および上層52の膜厚およびC含有量を第3表に示す。また、実施例1と同様の手順を用いて、磁気記録媒体の特性を評価した。測定結果を第4表に示す。
実施例6および比較例6で得られた磁気記録媒体のM−Hヒステリシスループを図3(a)および(b)に示す。図3(b)に示す比較例6の磁気記録媒体のM−Hヒステリシスループでは、曲線の平滑性が失われ、二段に分離したヒステリシスループが観察された。この結果は、Biを使用せずに形成したFePt−C膜において、FePt磁性結晶粒の柱状成長が一定の膜厚で停止し、その後にFePt磁性結晶粒の二次成長が起きたためと考えられる。一方、図3(a)に示す実施例6の磁気記録媒体のM−Hヒステリシスループでは、得られる曲線が平滑であり、ヒステリシスループの二段分離は観察されなかった。この結果は、Biを併用して下層51を形成することによりFePt磁性結晶粒の二次成長が抑制され、下層51および上層52全体を通してFePt磁性結晶粒の柱状成長がなされたためと考えられる。
20 密着層
30 下地層
40 シード層
50 磁気記録層
51 下層
52 上層
53 グラニュラー構造構成原子
54 サーファクタント原子
55 サーファクタント原子の移動により発生する空隙
60 保護層
Claims (11)
- 基板と、下層および上層を含む磁気記録層とを含む磁気記録媒体であって、前記下層および上層は、規則合金からなる磁性結晶粒と、非磁性結晶粒界とを含み、
前記下層は、規則合金を構成する元素と、Biと、Cとを堆積させることによって形成されており、
前記上層は、規則合金を構成する元素と、Cとを堆積させることによって形成されている
ことを特徴とする磁気記録媒体。 - 前記規則合金は、FeおよびCoからなる群から選択される少なくとも1つの元素と、Pt、Pd、AuおよびIrからなる群から選択される少なくとも1つの元素と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。
- 前記規則合金は、Ni、Mn、Cu、Ag、Au、RuおよびCrからなる群から選択される少なくとも1つの元素をさらに含むことを特徴とする請求項2に記載の磁気記録媒体。
- 前記規則合金は、L10型FePtであることを特徴とする請求項1に記載の磁気記録媒体。
- 前記下層は、0.1nm以上3nm以下の膜厚を有することを特徴とする請求項1から4のいずれかに記載の磁気記録媒体。
- 基板を準備する工程と
規則合金を構成する元素と、Biと、Cとをスパッターして、磁気記録層の下層を形成する工程と、
前記規則合金を構成する元素と、Cとをスパッターして、磁気記録層の上層を形成する工程と
を含むことを特徴とする磁気記録媒体の製造方法。 - 前記磁気記録層の下層および上層は、前記規則合金からなる磁性結晶粒と、Cを含む非磁性結晶粒界とを含むことを特徴とする請求項6に記載の磁気記録媒体の製造方法。
- 前記規則合金は、FeおよびCoからなる群から選択される少なくとも1つの元素と、Pt、Pd、AuおよびIrからなる群から選択される少なくとも1つの元素とを含むことを特徴とする請求項6に記載の磁気記録媒体の製造方法。
- 前記規則合金は、Ni、Mn、Cu、Ag、Au、RuおよびCrからなる群から選択される少なくとも1つの元素をさらに含むことを特徴とする請求項8に記載の磁気記録媒体の製造方法。
- 前記規則合金は、L10型FePtであることを特徴とする請求項6に記載の磁気記録媒体の製造方法。
- 前記下層は、0.1nm以上3nm以下の膜厚を有することを特徴とする請求項6から10のいずれかに記載の磁気記録媒体の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014235894A JP6260517B2 (ja) | 2014-11-20 | 2014-11-20 | 磁気記録媒体およびその製造方法 |
PCT/JP2015/004860 WO2016079916A1 (ja) | 2014-11-20 | 2015-09-24 | 磁気記録媒体およびその製造方法 |
MYPI2017701071A MY178603A (en) | 2014-11-20 | 2015-09-24 | Magnetic recording medium and method for producing same |
US15/476,466 US20170206919A1 (en) | 2014-11-20 | 2017-03-31 | Magnetic recording medium and method for producing same |
Applications Claiming Priority (1)
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JP2014235894A JP6260517B2 (ja) | 2014-11-20 | 2014-11-20 | 磁気記録媒体およびその製造方法 |
Publications (2)
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JP2016100036A JP2016100036A (ja) | 2016-05-30 |
JP6260517B2 true JP6260517B2 (ja) | 2018-01-17 |
Family
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JP2014235894A Active JP6260517B2 (ja) | 2014-11-20 | 2014-11-20 | 磁気記録媒体およびその製造方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170206919A1 (ja) |
JP (1) | JP6260517B2 (ja) |
MY (1) | MY178603A (ja) |
WO (1) | WO2016079916A1 (ja) |
Families Citing this family (1)
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CN112585295B (zh) * | 2018-08-09 | 2023-04-04 | Jx金属株式会社 | 溅射靶、磁性膜以及垂直磁记录介质 |
Family Cites Families (7)
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JP3799168B2 (ja) * | 1998-08-20 | 2006-07-19 | 株式会社日立グローバルストレージテクノロジーズ | 磁気記録再生装置 |
JP4074181B2 (ja) * | 2002-11-28 | 2008-04-09 | 株式会社東芝 | 垂直磁気記録媒体 |
JP2008052869A (ja) * | 2006-08-28 | 2008-03-06 | Hitachi Global Storage Technologies Netherlands Bv | 熱アシスト磁気記録媒体、及び磁気記録再生装置 |
JP2009087501A (ja) * | 2007-10-03 | 2009-04-23 | Showa Denko Kk | 垂直磁気記録媒体および磁気記録再生装置 |
JP5153575B2 (ja) * | 2008-10-31 | 2013-02-27 | 株式会社日立製作所 | 熱アシスト磁気記録媒体及び磁気記録装置 |
JP2012069607A (ja) * | 2010-09-21 | 2012-04-05 | Toshiba Corp | 磁気ランダムアクセスメモリ及びその製造方法 |
US9324353B2 (en) * | 2013-11-19 | 2016-04-26 | HGST Netherlands B.V. | Dual segregant heat assisted magnetic recording (HAMR) media |
-
2014
- 2014-11-20 JP JP2014235894A patent/JP6260517B2/ja active Active
-
2015
- 2015-09-24 MY MYPI2017701071A patent/MY178603A/en unknown
- 2015-09-24 WO PCT/JP2015/004860 patent/WO2016079916A1/ja active Application Filing
-
2017
- 2017-03-31 US US15/476,466 patent/US20170206919A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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WO2016079916A1 (ja) | 2016-05-26 |
JP2016100036A (ja) | 2016-05-30 |
MY178603A (en) | 2020-10-17 |
US20170206919A1 (en) | 2017-07-20 |
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