JP7590738B2 - 磁気記録媒体 - Google Patents

磁気記録媒体 Download PDF

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Publication number
JP7590738B2
JP7590738B2 JP2021572760A JP2021572760A JP7590738B2 JP 7590738 B2 JP7590738 B2 JP 7590738B2 JP 2021572760 A JP2021572760 A JP 2021572760A JP 2021572760 A JP2021572760 A JP 2021572760A JP 7590738 B2 JP7590738 B2 JP 7590738B2
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JP
Japan
Prior art keywords
recording medium
magnetic
magnetic recording
iron oxide
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
Application number
JP2021572760A
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English (en)
Japanese (ja)
Other versions
JPWO2021149716A1 (https=
JPWO2021149716A5 (https=
Inventor
健 高橋
克紀 前嶋
実 山鹿
潤 寺川
奈津貴 市瀬
友恵 佐藤
嵩 潟口
篤哉 砥綿
公洋 尾崎
章宏 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Institute of Advanced Industrial Science and Technology AIST
Sony Corp
Sony Group Corp
Original Assignee
National Institute of Advanced Industrial Science and Technology AIST
Sony Corp
Sony Group Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Institute of Advanced Industrial Science and Technology AIST, Sony Corp, Sony Group Corp filed Critical National Institute of Advanced Industrial Science and Technology AIST
Publication of JPWO2021149716A1 publication Critical patent/JPWO2021149716A1/ja
Publication of JPWO2021149716A5 publication Critical patent/JPWO2021149716A5/ja
Application granted granted Critical
Publication of JP7590738B2 publication Critical patent/JP7590738B2/ja
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
    • H01F1/117—Flexible bodies
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP2021572760A 2020-01-21 2021-01-20 磁気記録媒体 Active JP7590738B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020007832 2020-01-21
JP2020007832 2020-01-21
PCT/JP2021/001829 WO2021149716A1 (ja) 2020-01-21 2021-01-20 磁気記録媒体

Publications (3)

Publication Number Publication Date
JPWO2021149716A1 JPWO2021149716A1 (https=) 2021-07-29
JPWO2021149716A5 JPWO2021149716A5 (https=) 2024-01-12
JP7590738B2 true JP7590738B2 (ja) 2024-11-27

Family

ID=76991767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021572760A Active JP7590738B2 (ja) 2020-01-21 2021-01-20 磁気記録媒体

Country Status (4)

Country Link
US (1) US12614565B2 (https=)
JP (1) JP7590738B2 (https=)
DE (1) DE112021000640T5 (https=)
WO (1) WO2021149716A1 (https=)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121247891B (zh) * 2025-12-03 2026-03-20 山西潞安太行润滑科技股份有限公司 一种用于联轴器润滑脂的Fe2O3抗磨减摩剂及其制备与应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008189996A (ja) 2007-02-05 2008-08-21 Hitachi Metals Ltd Ｃｏ−Ｆｅ系合金スパッタリングターゲット材およびその製造方法
JP2019023950A (ja) 2017-07-24 2019-02-14 マクセルホールディングス株式会社 磁気記録媒体
JP2019175532A (ja) 2018-03-29 2019-10-10 富士フイルム株式会社 磁気記録媒体、イプシロン型酸化鉄系化合物の粒子の製造方法、及び磁気記録媒体の製造方法
JP6624332B1 (ja) 2019-08-21 2019-12-25 ソニー株式会社 磁気記録媒体およびカートリッジ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007114394A1 (ja) * 2006-03-30 2007-10-11 Fujifilm Corporation 磁気記録媒体、リニア磁気記録再生システムおよび磁気記録再生方法
JP6649234B2 (ja) * 2016-11-30 2020-02-19 富士フイルム株式会社 ε−酸化鉄型強磁性粉末および磁気記録媒体
WO2018203468A1 (ja) 2017-05-01 2018-11-08 ソニー株式会社 磁気記録媒体
US10854233B2 (en) * 2017-09-29 2020-12-01 Fujifilm Corporation Magnetic recording medium having characterized magnetic layer and magnetic recording and reproducing device
JP2020007832A (ja) 2018-07-11 2020-01-16 パナソニックＩｐマネジメント株式会社 衛生洗浄装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008189996A (ja) 2007-02-05 2008-08-21 Hitachi Metals Ltd Ｃｏ−Ｆｅ系合金スパッタリングターゲット材およびその製造方法
JP2019023950A (ja) 2017-07-24 2019-02-14 マクセルホールディングス株式会社 磁気記録媒体
JP2019175532A (ja) 2018-03-29 2019-10-10 富士フイルム株式会社 磁気記録媒体、イプシロン型酸化鉄系化合物の粒子の製造方法、及び磁気記録媒体の製造方法
JP6624332B1 (ja) 2019-08-21 2019-12-25 ソニー株式会社 磁気記録媒体およびカートリッジ

Also Published As

Publication number Publication date
WO2021149716A1 (ja) 2021-07-29
US12614565B2 (en) 2026-04-28
DE112021000640T5 (de) 2022-11-17
JPWO2021149716A1 (https=) 2021-07-29
US20230075546A1 (en) 2023-03-09

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