Vertical magnetic recording medium
A perpendicular magnetic recording and medium technology, applied in magnetic recording, data recording, recording information storage, etc., can solve the problems of inability to ensure signal-to-noise and large loss of signal output, and achieve the effect of improving signal-to-noise ratio and reproduction output
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
no. 1 example
[0024] A perpendicular magnetic recording medium according to a first embodiment of the present invention will be described with reference to FIGS. 1-6.
[0025] FIG. 1 shows a schematic cross-sectional view of the structure of a perpendicular magnetic recording medium according to this embodiment. FIG. 2 is a graph showing the dependence of the squareness ratio on the thickness of the nonmagnetic layer. 3 and 6 are graphs showing the dependence of the output on the thickness of the ferromagnetic layer. Fig. 4 is a graph showing the dependence of the signal-to-noise ratio on the thickness of the ferromagnetic layer. FIG. 5 is a graph showing the dependence of coercive force change on the angle of the magnetic property measurement direction.
[0026] First, the structure of the perpendicular magnetic recording medium according to the present embodiment will be described with reference to FIG. 1 .
[0027] A backing layer 12 made of a soft magnetic material is formed on the g...
no. 2 example
[0063] A perpendicular magnetic recording medium according to a second embodiment of the present invention is described with reference to FIGS. 7A-8. Components in this embodiment that are the same as those of the perpendicular magnetic recording medium according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and descriptions thereof are omitted or simplified.
[0064] 7A and 7B show schematic cross-sectional views of the structure of a perpendicular magnetic recording medium according to this embodiment. FIG. 8 is a graph showing the dependence of the signal-to-noise ratio on the film thickness of the ferromagnetic layer.
[0065] First, the structure of the perpendicular magnetic recording medium according to the present embodiment will be described with reference to FIGS. 7A and 7B . FIG. 7A is a cross-sectional view of the perpendicular magnetic recording medium according to the present embodiment, showing a schematic structure. 7B is...
no. 3 example
[0090] A magnetic recording apparatus according to a third embodiment of the present invention will be described with reference to FIG. 9 .
[0091] FIG. 9 is a schematic structural view of a magnetic recording device according to this embodiment.
[0092] In this embodiment, a magnetic recording apparatus using the perpendicular magnetic recording medium according to the first or second embodiment is explained.
[0093] The magnetic recording device 30 according to the present embodiment includes a case body 32 defining, for example, an elongated cuboid inner space. This accommodation space accommodates one or more magnetic disks 34 as recording media. The magnetic disk 34 is a perpendicular magnetic recording medium according to the first embodiment as shown in FIG. 1 or a perpendicular magnetic recording medium according to the second embodiment as shown in FIGS. 7A and 7B . The magnetic disk 34 is installed on the rotating shaft of the spindle motor 36 . Spindle motor 3...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More