FR1063809A - Matériaux aimantables - Google Patents

Matériaux aimantables

Info

Publication number
FR1063809A
FR1063809A FR1063809DA FR1063809A FR 1063809 A FR1063809 A FR 1063809A FR 1063809D A FR1063809D A FR 1063809DA FR 1063809 A FR1063809 A FR 1063809A
Authority
FR
France
Prior art keywords
magnetic materials
magnetic
materials
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)
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Application granted granted Critical
Publication of FR1063809A publication Critical patent/FR1063809A/fr
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
    • G11B5/70642—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
FR1063809D 1952-04-18 1952-04-18 Matériaux aimantables Expired FR1063809A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1063809T 1952-04-18

Publications (1)

Publication Number Publication Date
FR1063809A true FR1063809A (fr) 1954-05-07

Family

ID=9601367

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1063809D Expired FR1063809A (fr) 1952-04-18 1952-04-18 Matériaux aimantables

Country Status (1)

Country Link
FR (1) FR1063809A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371384A2 (fr) * 1988-12-01 1990-06-06 Ishihara Sangyo Kaisha, Ltd. Procédé de fabrication de particules magnétiques d'oxyde de fer pour l'enregistrement magnétique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0371384A2 (fr) * 1988-12-01 1990-06-06 Ishihara Sangyo Kaisha, Ltd. Procédé de fabrication de particules magnétiques d'oxyde de fer pour l'enregistrement magnétique
EP0371384A3 (fr) * 1988-12-01 1991-04-17 Ishihara Sangyo Kaisha, Ltd. Procédé de fabrication de particules magnétiques d'oxyde de fer pour l'enregistrement magnétique

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