GB1232337A - - Google Patents

Info

Publication number
GB1232337A
GB1232337A GB1232337DA GB1232337A GB 1232337 A GB1232337 A GB 1232337A GB 1232337D A GB1232337D A GB 1232337DA GB 1232337 A GB1232337 A GB 1232337A
Authority
GB
United Kingdom
Prior art keywords
cro
nov
doped
recording medium
iron oxide
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.)
Expired
Application number
Other languages
English (en)
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 filed Critical
Publication of GB1232337A publication Critical patent/GB1232337A/en
Expired legal-status Critical Current

Links

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
    • G11B5/70636—CrO2
    • 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
    • G11B5/706—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
    • 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
    • G11B5/70652—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 gamma - Fe2 O3
    • G11B5/70668—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 gamma - Fe2 O3 containing a dopant
    • G11B5/70673—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 gamma - Fe2 O3 containing a dopant containing Co

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
GB1232337D 1968-11-06 1969-11-03 Expired GB1232337A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8106868A JPS5526528B1 (xx) 1968-11-06 1968-11-06

Publications (1)

Publication Number Publication Date
GB1232337A true GB1232337A (xx) 1971-05-19

Family

ID=13736059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1232337D Expired GB1232337A (xx) 1968-11-06 1969-11-03

Country Status (3)

Country Link
JP (1) JPS5526528B1 (xx)
DE (1) DE1955699C3 (xx)
GB (1) GB1232337A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4860605A (xx) * 1971-11-26 1973-08-25
JPS4955303A (xx) * 1972-09-28 1974-05-29
EP0869481A1 (en) * 1997-03-31 1998-10-07 TDK Corporation Method for producing magnetic recording medium

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574013B2 (xx) * 1974-07-31 1982-01-23
JPS54107709A (en) * 1978-02-10 1979-08-23 Victor Co Of Japan Ltd Magnetic recording material
DE3322746C2 (de) * 1983-06-24 1994-06-23 Basf Ag Magnetische Aufzeichnungsträger
DE3825619A1 (de) * 1988-07-28 1990-02-01 Agfa Gevaert Ag Verfahren zur herstellung eines magnetischen aufzeichnungstraegers
DE3927622A1 (de) * 1989-08-22 1991-02-28 Basf Ag Magnetischer aufzeichnungstraeger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4860605A (xx) * 1971-11-26 1973-08-25
JPS5311841B2 (xx) * 1971-11-26 1978-04-25
JPS4955303A (xx) * 1972-09-28 1974-05-29
EP0869481A1 (en) * 1997-03-31 1998-10-07 TDK Corporation Method for producing magnetic recording medium
US6126990A (en) * 1997-03-31 2000-10-03 Tdk Corporation Method for producing magnetic recording medium

Also Published As

Publication number Publication date
DE1955699B2 (xx) 1974-01-17
DE1955699C3 (de) 1974-08-15
DE1955699A1 (de) 1970-06-18
JPS5526528B1 (xx) 1980-07-14

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years