JP6935869B2 - 熱アシスト磁気記録媒体および磁気記憶装置 - Google Patents
熱アシスト磁気記録媒体および磁気記憶装置 Download PDFInfo
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- JP6935869B2 JP6935869B2 JP2018121662A JP2018121662A JP6935869B2 JP 6935869 B2 JP6935869 B2 JP 6935869B2 JP 2018121662 A JP2018121662 A JP 2018121662A JP 2018121662 A JP2018121662 A JP 2018121662A JP 6935869 B2 JP6935869 B2 JP 6935869B2
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 52
- 239000000395 magnesium oxide Substances 0.000 claims description 36
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 27
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 20
- 239000011787 zinc oxide Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 8
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 claims description 7
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 claims description 6
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 126
- 239000006249 magnetic particle Substances 0.000 description 29
- 239000002245 particle Substances 0.000 description 22
- 239000011651 chromium Substances 0.000 description 11
- 239000013078 crystal Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 229910005335 FePt Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910018979 CoPt Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007737 ion beam deposition Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 description 2
- KELHQGOVULCJSG-UHFFFAOYSA-N n,n-dimethyl-1-(5-methylfuran-2-yl)ethane-1,2-diamine Chemical compound CN(C)C(CN)C1=CC=C(C)O1 KELHQGOVULCJSG-UHFFFAOYSA-N 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000521 B alloy Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910019582 Cr V Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910003310 Ni-Al Inorganic materials 0.000 description 1
- 229910000929 Ru alloy 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
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide 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
- G11B5/48—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
- G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
-
- 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
-
- 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
- G11B5/7375—Non-polymeric layer under the lowermost magnetic recording layer for heat-assisted or thermally-assisted magnetic recording [HAMR, TAMR]
-
- 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
Description
(2)前記第一の下地層は、前記磁性層と接触していることを特徴とする(1)に記載の熱アシスト磁気記録媒体。
(3)前記下地層は、第二の下地層をさらに含み、前記第二の下地層は、酸化マグネシウムを含み、前記基板と前記第一の下地層との間に形成されていることを特徴とする(1)または(2)に記載の熱アシスト磁気記録媒体。
(4)前記下地層は、第三の下地層をさらに含み、前記第三の下地層は、BCC構造またはB2構造を有する物質を含み、前記第一の下地層と前記磁性層との間に形成されており、前記第一の下地層と接触していることを特徴とする(1)〜(3)の何れか1項に記載の熱アシスト磁気記録媒体。
(5)(1)〜(4)の何れか1項に記載の熱アシスト磁気記録媒体を有することを特徴とする磁気記憶装置。
図1に、本実施形態の熱アシスト磁気記録媒体の層構成の一例を示す。
本実施形態の磁気記憶装置は、本実施形態の熱アシスト磁気記録媒体を有していれば、特に限定されない。
耐熱ガラス基板上に、厚さ50nmのCr−50at%Ti合金層(下地層)を形成し、250℃まで加熱した後、厚さ10nmのCr層(下地層)を形成した。その後、厚さ1nmのMo層(下地層)と、厚さ1nmのMgO層(第二の下地層)と、厚さ0.3nmの第一の下地層をこの順で形成し、520℃まで加熱した。その後、厚さ3nmの(Fe−55at%Pt)−40mol%C層(磁性層)と、厚さ3nmの(Fe−55at%Pt)−40mol%SiO2層(磁性層)をこの順で形成し、熱アシスト磁気記録媒体を得た。
TEMを用いて、第一の下地層に含まれるMgO粒子の<D>、σ/<D>を測定した。
X−ray diffraction(XRD)装置(Philips社製)を用いて、磁性層に含まれる磁性粒子のΔθ50を測定した。
Kerr磁気測定装置(ネオアーク社製)を用いて、熱アシスト磁気記録媒体のHcを測定した。
耐熱ガラス基板上に、厚さ50nmのCr−50at%Ti合金層(下地層)と、厚さ25nmのCo−20at%Ta−5at%B合金層(軟磁性下地層)と、厚さ0.3nmの第一の下地層をこの順で形成した後、250℃まで加熱した。その後、厚さ10nmのCr層(第二の下地層)と、厚さ1nmのMo層(下地層)と、厚さ1nmのMgO層(下地層)を形成した後、520℃まで加熱した。その後、厚さ3nmの(Fe−55at%Pt)−40mol%C層(磁性層)と、厚さ3nmの(Fe−55at%Pt)−40mol%SiO2層(磁性層)を形成し、熱アシスト磁気記録媒体を得た。
X−ray diffraction(XRD)装置(Philips社製)を用いて、第二の下地層に含まれるCrのΔθ50を測定した。
2A、2B 下地層
3 磁性層
4 第二の下地層
5 第一の下地層
6 第二の下地層
100A、100B、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(LD)
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
Claims (5)
- 基板と、下地層と、L10構造を有する合金を含む磁性層をこの順で有し、
前記下地層は、第一の下地層を含み、
前記第一の下地層は、酸化マグネシウムと、酸化バナジウム、酸化亜鉛、酸化スズ、窒化バナジウムおよび炭化バナジウムからなる群より選択される一種以上の化合物とを含み、該化合物の総含有量が45mol%〜70mol%の範囲内であることを特徴とする熱アシスト磁気記録媒体。 - 前記第一の下地層は、前記磁性層と接触していることを特徴とする請求項1に記載の熱アシスト磁気記録媒体。
- 前記下地層は、第二の下地層をさらに含み、
前記第二の下地層は、酸化マグネシウムを含み、前記基板と前記第一の下地層との間に形成されていることを特徴とする請求項1または2に記載の熱アシスト磁気記録媒体。 - 前記下地層は、第二の下地層をさらに含み、
前記第二の下地層は、BCC構造またはB2構造を有する物質を含み、前記第一の下地層と前記磁性層との間に形成されており、前記第一の下地層と接触していることを特徴とする請求項1に記載の熱アシスト磁気記録媒体。 - 請求項1〜4の何れか1項に記載の熱アシスト磁気記録媒体を有することを特徴とする磁気記憶装置。
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JP2018121662A JP6935869B2 (ja) | 2018-06-27 | 2018-06-27 | 熱アシスト磁気記録媒体および磁気記憶装置 |
US16/448,187 US10643649B2 (en) | 2018-06-27 | 2019-06-21 | Heat-assisted magnetic recording medium and magnetic storage apparatus |
CN201910552861.3A CN110648693B (zh) | 2018-06-27 | 2019-06-25 | 热辅助磁记录介质和磁存储装置 |
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KR101731847B1 (ko) * | 2011-07-01 | 2017-05-08 | 우베 마테리알즈 가부시키가이샤 | 스퍼터링용 MgO 타겟 |
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CN110648693B (zh) | 2021-01-15 |
CN110648693A (zh) | 2020-01-03 |
US20200005823A1 (en) | 2020-01-02 |
US10643649B2 (en) | 2020-05-05 |
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