DE112021000640T5 - Magnetisches aufzeichnungsmedium - Google Patents

Magnetisches aufzeichnungsmedium Download PDF

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Publication number
DE112021000640T5
DE112021000640T5 DE112021000640.1T DE112021000640T DE112021000640T5 DE 112021000640 T5 DE112021000640 T5 DE 112021000640T5 DE 112021000640 T DE112021000640 T DE 112021000640T DE 112021000640 T5 DE112021000640 T5 DE 112021000640T5
Authority
DE
Germany
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.)
Pending
Application number
DE112021000640.1T
Other languages
German (de)
English (en)
Inventor
Takeshi Takahashi
Katsunori Maeshima
Minoru Yamaga
Masaru Terakawa
Natsuki ICHISE
Tomoe Sato
Takashi Kataguchi
Atsuya Towata
Kimihiro Ozaki
Akihiro Matsumoto
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.)
Sony Group Corp
Original Assignee
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 Sony Group Corp filed Critical Sony Group Corp
Publication of DE112021000640T5 publication Critical patent/DE112021000640T5/de
Pending legal-status Critical Current

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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
    • G11B5/68—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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
DE112021000640.1T 2020-01-21 2021-01-20 Magnetisches aufzeichnungsmedium Pending DE112021000640T5 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020-007832 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 (1)

Publication Number Publication Date
DE112021000640T5 true DE112021000640T5 (de) 2022-11-17

Family

ID=76991767

Family Applications (1)

Application Number Title Priority Date Filing Date
DE112021000640.1T Pending DE112021000640T5 (de) 2020-01-21 2021-01-20 Magnetisches aufzeichnungsmedium

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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018203468A1 (ja) 2017-05-01 2018-11-08 ソニー株式会社 磁気記録媒体
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

Family Cites Families (7)

* 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
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
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
JP6877281B2 (ja) 2017-07-24 2021-05-26 マクセルホールディングス株式会社 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
JP6932103B2 (ja) 2018-03-29 2021-09-08 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018203468A1 (ja) 2017-05-01 2018-11-08 ソニー株式会社 磁気記録媒体
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

Also Published As

Publication number Publication date
WO2021149716A1 (ja) 2021-07-29
US12614565B2 (en) 2026-04-28
JP7590738B2 (ja) 2024-11-27
JPWO2021149716A1 (https=) 2021-07-29
US20230075546A1 (en) 2023-03-09

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Legal Events

Date Code Title Description
R012 Request for examination validly filed
R081 Change of applicant/patentee

Owner name: SONY GROUP CORPORATION, JP

Free format text: FORMER OWNERS: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOKYO, JP; SONY GROUP CORPORATION, TOKYO, JP