FR2389968A1 - - Google Patents

Info

Publication number
FR2389968A1
FR2389968A1 FR7738899A FR7738899A FR2389968A1 FR 2389968 A1 FR2389968 A1 FR 2389968A1 FR 7738899 A FR7738899 A FR 7738899A FR 7738899 A FR7738899 A FR 7738899A FR 2389968 A1 FR2389968 A1 FR 2389968A1
Authority
FR
France
Prior art keywords
layer formed
magnetic
ferrite particles
hard
ferrite 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.)
Granted
Application number
FR7738899A
Other languages
French (fr)
Other versions
FR2389968B1 (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.)
Unisys Corp
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of FR2389968A1 publication Critical patent/FR2389968A1/fr
Application granted granted Critical
Publication of FR2389968B1 publication Critical patent/FR2389968B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/085—Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation
    • 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
    • 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
    • H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H01F10/3222—Exchange coupled hard/soft multilayers, e.g. CoPt/Co or NiFe/CoSm
    • 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
    • H01F41/16—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 the magnetic material being applied in the form of particles, e.g. by serigraphy, to form thick magnetic films or precursors therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thin Magnetic Films (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Heads (AREA)

Abstract

a. Structure magnétique créant un champ de polarisation pour des éléments de mémoire à bulle magnétique b. Structure caractérisée en ce qu'elle se compose d'une couche de ferrite dure formée de particules de ferrite dure et d'une couche de ferrite douce formée de particules de ferrite douce, ces deux couches étant réunies par frittage pour former une liaison entre elles et donner une structure stratifiée.at. Magnetic structure creating a bias field for magnetic bubble memory elements b. Structure characterized in that it consists of a hard ferrite layer formed of hard ferrite particles and a soft ferrite layer formed of soft ferrite particles, these two layers being joined by sintering to form a bond between them and give a layered structure.

FR7738899A 1977-05-02 1977-12-22 Expired FR2389968B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79257777A 1977-05-02 1977-05-02

Publications (2)

Publication Number Publication Date
FR2389968A1 true FR2389968A1 (en) 1978-12-01
FR2389968B1 FR2389968B1 (en) 1983-02-04

Family

ID=25157374

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738899A Expired FR2389968B1 (en) 1977-05-02 1977-12-22

Country Status (5)

Country Link
JP (1) JPS53135500A (en)
BR (1) BR7802417A (en)
DE (1) DE2817983A1 (en)
FR (1) FR2389968B1 (en)
GB (1) GB1575498A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514930A1 (en) * 1981-10-19 1983-04-22 Kureha Chemical Ind Co Ltd LAMELLAR DEVICE WITH MAGNETIC DOMAINS, PARTICULARLY FOR MEMORY
EP1821322A1 (en) * 2006-02-20 2007-08-22 BARLOG plastics GmbH Magnetic body and method for its production

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8318111D0 (en) * 1983-07-04 1983-08-03 Secr Defence Magnetic assemblies
DE3634198A1 (en) * 1986-10-08 1988-04-21 Peters W Maschf CUTTER
DE10217027A1 (en) * 2002-04-12 2003-10-30 Valeo Schalter & Sensoren Gmbh Angular position sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024392A (en) * 1954-08-27 1962-03-06 Baermann Max Process for the manufacture of plastic bound permanent magnets
FR2191226A1 (en) * 1972-06-28 1974-02-01 Baermann Max
FR2254536A1 (en) * 1973-12-12 1975-07-11 Xerox Corp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5425309B2 (en) * 1972-07-14 1979-08-27
JPS4935898A (en) * 1972-08-03 1974-04-03
US3931618A (en) * 1973-11-14 1976-01-06 Hewlett-Packard Company Housing structure and magnetic biasing for bubble memories
US3927397A (en) * 1974-05-02 1975-12-16 Honeywell Inf Systems Bias field apparatus for magnetic domain memory device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024392A (en) * 1954-08-27 1962-03-06 Baermann Max Process for the manufacture of plastic bound permanent magnets
FR2191226A1 (en) * 1972-06-28 1974-02-01 Baermann Max
FR2254536A1 (en) * 1973-12-12 1975-07-11 Xerox Corp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514930A1 (en) * 1981-10-19 1983-04-22 Kureha Chemical Ind Co Ltd LAMELLAR DEVICE WITH MAGNETIC DOMAINS, PARTICULARLY FOR MEMORY
EP1821322A1 (en) * 2006-02-20 2007-08-22 BARLOG plastics GmbH Magnetic body and method for its production

Also Published As

Publication number Publication date
DE2817983A1 (en) 1978-11-09
GB1575498A (en) 1980-09-24
JPS53135500A (en) 1978-11-27
BR7802417A (en) 1979-02-13
FR2389968B1 (en) 1983-02-04

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
ST Notification of lapse