JPS57105838A - Photo-thermal magnetic recording medium - Google Patents
Photo-thermal magnetic recording mediumInfo
- Publication number
- JPS57105838A JPS57105838A JP55183010A JP18301080A JPS57105838A JP S57105838 A JPS57105838 A JP S57105838A JP 55183010 A JP55183010 A JP 55183010A JP 18301080 A JP18301080 A JP 18301080A JP S57105838 A JPS57105838 A JP S57105838A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- thin film
- magnetic substance
- magnetic
- high permeability
- 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
- 239000000126 substance Substances 0.000 abstract 6
- 239000010409 thin film Substances 0.000 abstract 5
- 230000035699 permeability Effects 0.000 abstract 4
- 238000001771 vacuum deposition Methods 0.000 abstract 4
- 229910000640 Fe alloy Inorganic materials 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 238000007747 plating Methods 0.000 abstract 2
- 229910000531 Co alloy Inorganic materials 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 238000000313 electron-beam-induced deposition Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 229910052718 tin Inorganic materials 0.000 abstract 1
- 229910052723 transition metal Inorganic materials 0.000 abstract 1
- 150000003624 transition metals Chemical class 0.000 abstract 1
- 239000012780 transparent material Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
- G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
- G11B5/676—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling layer
-
- 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 enable recording of stable binary signals magnetically and thermally, by forming a photo-thermal magnetic recording medium, through the provision of an amorphous magnetic substance film and a high permeability magnetic substance thin film sequentially on a transparent base. CONSTITUTION:An amorphous magnetic substance thin film 2 is formed on a transparent base 1 with a method such as vacuum deposition, and electron beam deposition, and a non-magnetic member is formed by a method such as plating, vacuum deposition and coating on it, if required to form a non-magnetic intermediate layer thin film 4, and a high permeability magnetic substance is formed on it with a method such as plating and vacuum deposition to form a high permeability magnetic thin film 3. As the transparent base, a transparent material such as glass plate and plastic plate is used, and a target member to form an amorphous magnetic thin film, for example, Gd-Co alloy, Gd-Fe alloy, Tb-Fe alloy or Dy-Fe alloy is used. Further, as the high permeability magnetic substance, transition metal of Fe, Co, Ni or the like or its alloy, and as the non-magnetic substance material, metal such as Cu, Al, Zn, and Sn or its alloy, oxide or resin is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55183010A JPS57105838A (en) | 1980-12-24 | 1980-12-24 | Photo-thermal magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55183010A JPS57105838A (en) | 1980-12-24 | 1980-12-24 | Photo-thermal magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57105838A true JPS57105838A (en) | 1982-07-01 |
Family
ID=16128153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55183010A Pending JPS57105838A (en) | 1980-12-24 | 1980-12-24 | Photo-thermal magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57105838A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0114076A2 (en) * | 1983-01-17 | 1984-07-25 | Hitachi, Ltd. | Magnetic head |
| EP0147126A2 (en) * | 1983-12-16 | 1985-07-03 | Hitachi, Ltd. | Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same |
| JPS60212850A (en) * | 1984-04-09 | 1985-10-25 | Matsushita Electric Ind Co Ltd | Photomagnetic disk |
| JPS61163338U (en) * | 1985-03-26 | 1986-10-09 | ||
| US5202862A (en) * | 1990-06-13 | 1993-04-13 | Sharp Kabushiki Kaisha | Magneto-optical recording and reproducing device having integrally formed recording and reproducing magnetic heads |
-
1980
- 1980-12-24 JP JP55183010A patent/JPS57105838A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0114076A2 (en) * | 1983-01-17 | 1984-07-25 | Hitachi, Ltd. | Magnetic head |
| EP0147126A2 (en) * | 1983-12-16 | 1985-07-03 | Hitachi, Ltd. | Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same |
| US4748089A (en) * | 1983-12-16 | 1988-05-31 | Hitachi, Ltd. | Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same |
| JPS60212850A (en) * | 1984-04-09 | 1985-10-25 | Matsushita Electric Ind Co Ltd | Photomagnetic disk |
| JPS61163338U (en) * | 1985-03-26 | 1986-10-09 | ||
| US5202862A (en) * | 1990-06-13 | 1993-04-13 | Sharp Kabushiki Kaisha | Magneto-optical recording and reproducing device having integrally formed recording and reproducing magnetic heads |
| US5325344A (en) * | 1990-06-13 | 1994-06-28 | Sharp Kabushiki Kaisha | Magneto-optical recording and reproducing device having integrally formed recording and reproducing magnetic heads |
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