CA2159233A1 - Method, Apparatus and Medium for Magneto-Optical Recording - Google Patents
Method, Apparatus and Medium for Magneto-Optical RecordingInfo
- Publication number
- CA2159233A1 CA2159233A1 CA 2159233 CA2159233A CA2159233A1 CA 2159233 A1 CA2159233 A1 CA 2159233A1 CA 2159233 CA2159233 CA 2159233 CA 2159233 A CA2159233 A CA 2159233A CA 2159233 A1 CA2159233 A1 CA 2159233A1
- Authority
- CA
- Canada
- Prior art keywords
- temperature
- reference layer
- magneto
- optical recording
- recorded
- 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
Links
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 101150031250 retm gene Proteins 0.000 abstract 1
Abstract
The object of the invention is to eliminate by using a multi-layered film initializing field in magneto-optical recording capable of direct overwriting, and to decrease the restrictions on the compositions of materials for media. The medium consists of two exchange-coupled RETM
amorphous layers (a memory layer a reference layer) whose Curie temperatures arealmost the same and only one of which is RE-rich without a compensation temperature, the two layers being laminated directly or indirectly with an intermediate layer that allows exchange-coupling to be interposed. Before recording is carried out, the reference layer is magnetized in one direction. Pulses of energy are emitted from the memory layer side so that the temperature of the reference layer remains below its Curie temperature when one of the bit data is recorded but reaches its Curie temperature when the other of the bit data is recorded.
amorphous layers (a memory layer a reference layer) whose Curie temperatures arealmost the same and only one of which is RE-rich without a compensation temperature, the two layers being laminated directly or indirectly with an intermediate layer that allows exchange-coupling to be interposed. Before recording is carried out, the reference layer is magnetized in one direction. Pulses of energy are emitted from the memory layer side so that the temperature of the reference layer remains below its Curie temperature when one of the bit data is recorded but reaches its Curie temperature when the other of the bit data is recorded.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21472/91 | 1991-01-23 | ||
| JP3021472A JP2567996B2 (en) | 1991-01-23 | 1991-01-23 | Magneto-optical recording method and apparatus |
| CA002059179A CA2059179C (en) | 1991-01-23 | 1992-01-10 | Magneto-optic overwriting medium with rare earth-transition metal layers |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002059179A Division CA2059179C (en) | 1991-01-23 | 1992-01-10 | Magneto-optic overwriting medium with rare earth-transition metal layers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2159233A1 true CA2159233A1 (en) | 1992-07-24 |
| CA2159233C CA2159233C (en) | 1998-11-03 |
Family
ID=25674922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002159233A Expired - Fee Related CA2159233C (en) | 1991-01-23 | 1992-01-10 | Method, apparatus and medium for magneto-optical recording |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2159233C (en) |
-
1992
- 1992-01-10 CA CA002159233A patent/CA2159233C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2159233C (en) | 1998-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |