JPS6455763A - Magneto-optical recording medium and magneto-optical recording method for said medium - Google Patents
Magneto-optical recording medium and magneto-optical recording method for said mediumInfo
- Publication number
- JPS6455763A JPS6455763A JP21232787A JP21232787A JPS6455763A JP S6455763 A JPS6455763 A JP S6455763A JP 21232787 A JP21232787 A JP 21232787A JP 21232787 A JP21232787 A JP 21232787A JP S6455763 A JPS6455763 A JP S6455763A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- magnetic
- recording medium
- magneto
- optical recording
- 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.)
- Pending
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
- G11B11/105—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 using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
-
- 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
- G11B11/105—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 using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
Abstract
PURPOSE:To control the magnetic field direction of a recording layer to execute overwriting by providing the magnetic layer having a high magnetic permeability on a magneto-optical recording medium, applying magnetic fields in the direction reverse from each other to the magnetic layer from both sides of the magneto-optical recording medium and controlling the power of the laser to be projected to the recording medium. CONSTITUTION:An underlying layer 12, buffer layer 14 and protective layer 16 on a transparent glass substrate 11 provided with guide grooves are made of SiO2, etc. The recording layer 13 is a thin amorphous magnetic film consisting of TbFe, etc., and the high-permeability magnetic layer 15 consists of 'Permalloy(R)', etc. These layers are successively deposited. Permanent magnets 20 (20a, 20b) and 21 are installed on both sides of the recording medium 10 and the magnetic fields H1>H2 are applied to the recording medium in the directions reverse from each other. The laser light is condensed by a lens 2 and H2 does not leak to the recording layer 13 and the layer 13 is magnetized downward when the power of the laser to be projected is low. H2 is applied to both the layers 13, 15 and therefore, H2 leaks to the layer 13 side as well and the layer 13 is magnetized upward regardless of the recording of the light when the power is high. The overwriting is, therefore, executed by modulating the laser power between the low and high levels by 1, 0 of information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21232787A JPS6455763A (en) | 1987-08-26 | 1987-08-26 | Magneto-optical recording medium and magneto-optical recording method for said medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21232787A JPS6455763A (en) | 1987-08-26 | 1987-08-26 | Magneto-optical recording medium and magneto-optical recording method for said medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6455763A true JPS6455763A (en) | 1989-03-02 |
Family
ID=16620703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21232787A Pending JPS6455763A (en) | 1987-08-26 | 1987-08-26 | Magneto-optical recording medium and magneto-optical recording method for said medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6455763A (en) |
-
1987
- 1987-08-26 JP JP21232787A patent/JPS6455763A/en active Pending
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