FR2400493A1 - PROCESS FOR FORMING AN OPTICAL MAGNETIC POLYCRYSTALLINE LAYER OF COBALT FERRITE, AND COBALT FERRITE LAYER SHAPED SO - Google Patents

PROCESS FOR FORMING AN OPTICAL MAGNETIC POLYCRYSTALLINE LAYER OF COBALT FERRITE, AND COBALT FERRITE LAYER SHAPED SO

Info

Publication number
FR2400493A1
FR2400493A1 FR7823577A FR7823577A FR2400493A1 FR 2400493 A1 FR2400493 A1 FR 2400493A1 FR 7823577 A FR7823577 A FR 7823577A FR 7823577 A FR7823577 A FR 7823577A FR 2400493 A1 FR2400493 A1 FR 2400493A1
Authority
FR
France
Prior art keywords
cobalt ferrite
optical magnetic
layer
forming
cobalt
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.)
Granted
Application number
FR7823577A
Other languages
French (fr)
Other versions
FR2400493B1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2400493A1 publication Critical patent/FR2400493A1/en
Application granted granted Critical
Publication of FR2400493B1 publication Critical patent/FR2400493B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/0009—Materials therefor
    • G02F1/0036—Magneto-optical materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
    • H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
    • H01F10/18—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being compounds
    • H01F10/20—Ferrites

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Thin Magnetic Films (AREA)
  • Chemically Coating (AREA)
  • Compounds Of Iron (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

On obtient des couches minces en ferrite de cobalt polycristallin, utilisées en particulier pour des applications magnétiques optiques, du fait qu'une solution de nitrates hydratés de fer et de cobalt est traitée de façon à devenir un aerosol qui par la suite est projeté sur un substrat chauffé. La rotation magnétique optique des couches obtenues de la sorte est égale à plusieurs fois celle des couches connues jusqu'à présent Application aux mémoires magnétiques optiques.Thin films of polycrystalline cobalt ferrite are obtained, used in particular for optical magnetic applications, due to the fact that a solution of hydrated nitrates of iron and cobalt is treated so as to become an aerosol which is subsequently sprayed on a heated substrate. The optical magnetic rotation of the layers obtained in this way is equal to several times that of the layers known hitherto. Application to optical magnetic memories.

FR7823577A 1977-08-15 1978-08-10 PROCESS FOR FORMING AN OPTICAL MAGNETIC POLYCRYSTALLINE LAYER OF COBALT FERRITE, AND COBALT FERRITE LAYER SHAPED SO Granted FR2400493A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7708959A NL7708959A (en) 1977-08-15 1977-08-15 PROCEDURE FOR FORMING A MAGNETO-OPTIC POLYCRYSTALLINE COBALT FERRITE LAYER AND COBALT FERRITE LAYER MANUFACTURED BY THE PROCESS.

Publications (2)

Publication Number Publication Date
FR2400493A1 true FR2400493A1 (en) 1979-03-16
FR2400493B1 FR2400493B1 (en) 1983-02-25

Family

ID=19829014

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7823577A Granted FR2400493A1 (en) 1977-08-15 1978-08-10 PROCESS FOR FORMING AN OPTICAL MAGNETIC POLYCRYSTALLINE LAYER OF COBALT FERRITE, AND COBALT FERRITE LAYER SHAPED SO

Country Status (7)

Country Link
JP (1) JPS5435900A (en)
AU (1) AU521775B2 (en)
CA (1) CA1143258A (en)
DE (1) DE2835203A1 (en)
FR (1) FR2400493A1 (en)
GB (1) GB2002338B (en)
NL (1) NL7708959A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8203725A (en) * 1982-09-27 1984-04-16 Philips Nv THERMO-MAGNETO-OPTICAL MEMORY DEVICE AND RECORD MEDIUM FOR THAT.
NL8204291A (en) * 1982-11-05 1984-06-01 Philips Nv OPTICAL REGISTRATION ELEMENT.
NL8301916A (en) * 1983-05-31 1984-12-17 Philips Nv THERMO-MAGNETO-OPTICAL REGISTRATION DEVICE AND REGISTRATION ELEMENT THEREFOR.
US4670323A (en) * 1983-11-26 1987-06-02 Ricoh Company, Ltd. Magneto-optic recording medium having a metal oxide recording layer
US4670322A (en) * 1983-12-05 1987-06-02 Ricoh Company, Ltd. Metal oxide magnetic substance and a magnetic film consisting thereof and their uses
DE3503996A1 (en) * 1984-02-06 1985-08-08 Ricoh Co., Ltd., Tokio/Tokyo MAGNETIC METAL OXIDE SUBSTANCE AND AN EXISTING MAGNETIC LAYER AND THEIR USE
JPS63290465A (en) * 1987-05-22 1988-11-28 Matsushita Graphic Commun Syst Inc Picture reader
JPH0246705A (en) * 1988-08-09 1990-02-16 Asahi Chem Ind Co Ltd Cobalt ferrite magnetic thin film
CA2048740A1 (en) * 1990-12-24 1992-06-25 John A. Deluca Method of preparing metal oxide films
JP4560619B2 (en) * 2003-03-26 2010-10-13 独立行政法人産業技術総合研究所 Permanent magnet membrane
JP2010083700A (en) * 2008-09-30 2010-04-15 Dainippon Printing Co Ltd Layered body having cobalt oxide film

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE644605A (en) * 1963-03-06 1964-07-01
FR2143435A1 (en) * 1971-06-25 1973-02-02 Kyoto Ceramic

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1010205B (en) * 1952-09-22 1957-06-13 Siemens Ag Manufacture of ferromagnetic sintered ferrite bodies
DE1017298B (en) * 1953-03-06 1957-10-10 Siemens Ag Process for the production of a ferromagnetic, electrically non-conductive layer on carrier pads
DE1091025B (en) * 1959-08-29 1960-10-13 Werk Fuer Bauelemente Der Nach Process for the production of ferrite components
US3404026A (en) * 1965-04-06 1968-10-01 Army Usa Method of forming magnetic ferrite films
DE1917644A1 (en) * 1968-01-06 1970-09-10 Stamicarbon Process for the production of plates, tapes or molded bodies containing permanently magnetizable particles for the magnetic storage of information

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE644605A (en) * 1963-03-06 1964-07-01
FR2143435A1 (en) * 1971-06-25 1973-02-02 Kyoto Ceramic

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CA1975 *
CA1978 *
EXBK/64 *
EXBK/76 *

Also Published As

Publication number Publication date
FR2400493B1 (en) 1983-02-25
GB2002338A (en) 1979-02-21
NL7708959A (en) 1979-02-19
AU521775B2 (en) 1982-04-29
DE2835203A1 (en) 1979-02-22
AU3884578A (en) 1980-02-14
GB2002338B (en) 1982-04-15
DE2835203C2 (en) 1988-03-10
JPS62848B2 (en) 1987-01-09
JPS5435900A (en) 1979-03-16
CA1143258A (en) 1983-03-22

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