NL7508707A - Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser - Google Patents

Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser

Info

Publication number
NL7508707A
NL7508707A NL7508707A NL7508707A NL7508707A NL 7508707 A NL7508707 A NL 7508707A NL 7508707 A NL7508707 A NL 7508707A NL 7508707 A NL7508707 A NL 7508707A NL 7508707 A NL7508707 A NL 7508707A
Authority
NL
Netherlands
Prior art keywords
gadolinium
high sensitivity
iron
strip
substrate
Prior art date
Application number
NL7508707A
Other languages
Dutch (nl)
Original Assignee
Ir G Ped I
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 Ir G Ped I filed Critical Ir G Ped I
Priority to NL7508707A priority Critical patent/NL7508707A/en
Publication of NL7508707A publication Critical patent/NL7508707A/en

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
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/16—Layers for recording by changing the magnetic properties, e.g. for Curie-point-writing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
    • G11C13/06—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using magneto-optical elements
    • 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
    • H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
    • H01F10/13—Amorphous metallic alloys, e.g. glassy metals
    • H01F10/133—Amorphous metallic alloys, e.g. glassy metals containing rare earth metals
    • H01F10/135—Amorphous metallic alloys, e.g. glassy metals containing rare earth metals containing transition metals
    • H01F10/136—Amorphous metallic alloys, e.g. glassy metals containing rare earth metals containing transition metals containing iron

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thin Magnetic Films (AREA)

Abstract

Carrier for thermo-magnetic recording has a substrate made of an electrically-insulating material, e.g. glass, coated with a working layer of iron-gadolinium strip with the direction of easy magnetisation perpendicular to the surface of the substrate. The strip contains 65 plus-or-minus 5 wt.% gadolinium, the remainder being iron. The gadolinium iron strip is pref. applied to the substrate by thermal evapn. in a vacuum of 10-6 torr. The working layer requires no coating and works for >=2 years at room temp.; only weak recording and erasing fields (ca 90 0) are required. The high sensitivity of the Gd-Fe permits the use of a GaAs semiconductor laser for data recording so that an economic magneto-optic memory store of high capacity is achievable using this carrier.
NL7508707A 1975-07-22 1975-07-22 Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser NL7508707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7508707A NL7508707A (en) 1975-07-22 1975-07-22 Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7508707A NL7508707A (en) 1975-07-22 1975-07-22 Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser

Publications (1)

Publication Number Publication Date
NL7508707A true NL7508707A (en) 1977-01-25

Family

ID=19824184

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7508707A NL7508707A (en) 1975-07-22 1975-07-22 Gadolinium iron alloy for thermomagnetic recording - with high sensitivity for use with gallium arsenide laser

Country Status (1)

Country Link
NL (1) NL7508707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002642A1 (en) * 1979-02-06 1980-08-14 Philips Nv THERMOMAGNETIC DATA CARRIER AND OPTICAL STORAGE WITH SUCH A DATA CARRIER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002642A1 (en) * 1979-02-06 1980-08-14 Philips Nv THERMOMAGNETIC DATA CARRIER AND OPTICAL STORAGE WITH SUCH A DATA CARRIER

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