JPS57183647A - Magentrooptical storage element - Google Patents

Magentrooptical storage element

Info

Publication number
JPS57183647A
JPS57183647A JP7028481A JP7028481A JPS57183647A JP S57183647 A JPS57183647 A JP S57183647A JP 7028481 A JP7028481 A JP 7028481A JP 7028481 A JP7028481 A JP 7028481A JP S57183647 A JPS57183647 A JP S57183647A
Authority
JP
Japan
Prior art keywords
film
reflecting
track
reflecting film
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
JP7028481A
Other languages
Japanese (ja)
Other versions
JPH034973B2 (en
Inventor
Kenji Oota
Toshihisa Deguchi
Akira Takahashi
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP7028481A priority Critical patent/JPS57183647A/en
Priority to US06/275,388 priority patent/US4414650A/en
Priority to FR8112234A priority patent/FR2485241B1/en
Priority to GB8119345A priority patent/GB2081537B/en
Priority to DE3124573A priority patent/DE3124573C2/en
Publication of JPS57183647A publication Critical patent/JPS57183647A/en
Publication of JPH034973B2 publication Critical patent/JPH034973B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field

Abstract

PURPOSE:To increase the magnetroptical effect and at the same time to obtain a servo guide track, by forming a magnetic thin film containing a magnetization facilitating axis vertical to the film surface on a transparent substrate and then forming a belt-shaped reflecting film on the said thin film. CONSTITUTION:A vertical magnetized film 2 of an amorphous ferrimagnetic material composed of a rare earth group and a transition metal is formed on a substrate 1, and a transparent dielectric film 2 of SiO2, SiO, etc. is formed on the film 2. Furthermore a reflecting layer 4 of Cu, Au, Ag, etc. is formed in a belt shape on the film 3. And a protecting adhesive layer 5 is formed on the layer 4. The laser focused by a condenser lens 10 is irradiated to a track 7 containing a reflecting film, and the information is recorded, reproduced and erased by using the part 11 of the magnetic film corresponding to the reflecting film 4 for a recording track. A Kerr rotational angle is increased by the reflecting film 7 in the reproduction time. The part 8 having no reflecting film is used for a guide track.
JP7028481A 1980-06-23 1981-05-08 Magentrooptical storage element Granted JPS57183647A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP7028481A JPS57183647A (en) 1981-05-08 1981-05-08 Magentrooptical storage element
US06/275,388 US4414650A (en) 1980-06-23 1981-06-19 Magneto-optic memory element
FR8112234A FR2485241B1 (en) 1980-06-23 1981-06-22 MAGNETO-OPTICAL MEMORY ELEMENT
GB8119345A GB2081537B (en) 1980-06-23 1981-06-23 Magneto-optic memory element
DE3124573A DE3124573C2 (en) 1980-06-23 1981-06-23 Magneto-optical storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7028481A JPS57183647A (en) 1981-05-08 1981-05-08 Magentrooptical storage element

Publications (2)

Publication Number Publication Date
JPS57183647A true JPS57183647A (en) 1982-11-12
JPH034973B2 JPH034973B2 (en) 1991-01-24

Family

ID=13427023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7028481A Granted JPS57183647A (en) 1980-06-23 1981-05-08 Magentrooptical storage element

Country Status (1)

Country Link
JP (1) JPS57183647A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6391847A (en) * 1986-10-03 1988-04-22 Ricoh Co Ltd Magneto-optical recording medium
JPH04364250A (en) * 1991-09-26 1992-12-16 Brother Ind Ltd Optical recording medium
US5425008A (en) * 1991-10-25 1995-06-13 Sharp Kabushiki Kaisha Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105344A (en) * 1980-01-25 1981-08-21 Fuji Photo Film Co Ltd Photomagnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56105344A (en) * 1980-01-25 1981-08-21 Fuji Photo Film Co Ltd Photomagnetic recording medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6391847A (en) * 1986-10-03 1988-04-22 Ricoh Co Ltd Magneto-optical recording medium
JPH04364250A (en) * 1991-09-26 1992-12-16 Brother Ind Ltd Optical recording medium
US5425008A (en) * 1991-10-25 1995-06-13 Sharp Kabushiki Kaisha Magneto-optical memory device whereon overwriting operation can be carried out through light intensity modulation and method for recording and erasing using it

Also Published As

Publication number Publication date
JPH034973B2 (en) 1991-01-24

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