JPS5625245A - Magnetic recording medium and magnetic recording and reproducing system - Google Patents
Magnetic recording medium and magnetic recording and reproducing systemInfo
- Publication number
- JPS5625245A JPS5625245A JP10187679A JP10187679A JPS5625245A JP S5625245 A JPS5625245 A JP S5625245A JP 10187679 A JP10187679 A JP 10187679A JP 10187679 A JP10187679 A JP 10187679A JP S5625245 A JPS5625245 A JP S5625245A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- layer
- light
- magnetic recording
- magnetic substance
- 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
Abstract
PURPOSE: To attain reproduction high purity easily by making optical reproduction possible by stacking a layer large in magnetooptical effect and a magnetic substance layer.
CONSTITUTION: On supporter 20 made of a polymer material or nonmagnetic metal, metal, magnetic substanc layer 21 made of a high-magnetic-permeability material such as iron is formed. On the surface of this magnetic substance layer 21, magnetic substance layer 22 of vertical anisopropy made of CoCr, etc., with an easy-to- magnetize axis in the vertical direction is formed and magnetic substance layer 23 of Fe, etc., with large Kerr effect is formed. Residual magnetism is generated by applying the film surface of this recording medium with magnetic field 40 and laser light is focused to perform write operation at the Curie point. In reproduction, light 31 is caused to strike magnetic layer 23 by way of polarizer 32 and lens system 33. Its reflected light 34 is focused through lens system 35 and through analyzer 36, photodetector 37 detects the light. Consequently, an output that corresponds to the direction of magnetism in magnetic layer 23 can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10187679A JPS5625245A (en) | 1979-08-09 | 1979-08-09 | Magnetic recording medium and magnetic recording and reproducing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10187679A JPS5625245A (en) | 1979-08-09 | 1979-08-09 | Magnetic recording medium and magnetic recording and reproducing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5625245A true JPS5625245A (en) | 1981-03-11 |
Family
ID=14312161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10187679A Pending JPS5625245A (en) | 1979-08-09 | 1979-08-09 | Magnetic recording medium and magnetic recording and reproducing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5625245A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6093618A (en) * | 1983-10-27 | 1985-05-25 | Teruo Fujii | Plate magnetic recording body and detection of signal inputting condition |
-
1979
- 1979-08-09 JP JP10187679A patent/JPS5625245A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6093618A (en) * | 1983-10-27 | 1985-05-25 | Teruo Fujii | Plate magnetic recording body and detection of signal inputting condition |
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