JPS6479930A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6479930A JPS6479930A JP23654587A JP23654587A JPS6479930A JP S6479930 A JPS6479930 A JP S6479930A JP 23654587 A JP23654587 A JP 23654587A JP 23654587 A JP23654587 A JP 23654587A JP S6479930 A JPS6479930 A JP S6479930A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- magnetic
- magnetized film
- film
- powder
- 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
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To obtain high reproduced output over the entire frequency range by forming a magnetic layer into a two-layered structure and respectively selecting the coercive force Hc, residual magnetic flux density Br, film thickness, planar ratio of powder, etc., of the two layers. CONSTITUTION:The magnetic layers 12 and 13 are successively coated on the surface of a substrate 11. The layer 12 is formed as the intra-surface magnetized film having 350-700 oersted coercive force Hc and 700-1,500 gauss residual magnetic flux density Br and the layer 13 is formed as the perpendicular magnetized film having 0.5-1.5mum film thickness, 300-700 oersted Hc and 500-1,000 gauss Br. The intra-surface magnetized film of the layer 12 is constituted of acicular magnetic powder of a gamma-Fe2O3 system and the perpendicular magnetized film of the layer 13 is constituted of planar magnetic powder of hexagonal ferrite.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23654587A JPS6479930A (en) | 1987-09-21 | 1987-09-21 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23654587A JPS6479930A (en) | 1987-09-21 | 1987-09-21 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6479930A true JPS6479930A (en) | 1989-03-24 |
Family
ID=17002253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23654587A Pending JPS6479930A (en) | 1987-09-21 | 1987-09-21 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6479930A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03286420A (en) * | 1990-03-30 | 1991-12-17 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPH0417123A (en) * | 1990-05-10 | 1992-01-21 | Toshiba Corp | Contact transfer system for magnetic recording signal |
JPH0419815A (en) * | 1990-05-11 | 1992-01-23 | Toshiba Corp | Multi-frequency superposed magnetic recording system |
JP2008011768A (en) * | 2006-07-05 | 2008-01-24 | Kubota Corp | Pick-up structure of combine harvester |
-
1987
- 1987-09-21 JP JP23654587A patent/JPS6479930A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03286420A (en) * | 1990-03-30 | 1991-12-17 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPH0417123A (en) * | 1990-05-10 | 1992-01-21 | Toshiba Corp | Contact transfer system for magnetic recording signal |
JPH0419815A (en) * | 1990-05-11 | 1992-01-23 | Toshiba Corp | Multi-frequency superposed magnetic recording system |
JP2008011768A (en) * | 2006-07-05 | 2008-01-24 | Kubota Corp | Pick-up structure of combine harvester |
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