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Magnetic recording medium and producing method thereof, magnetic recording and reproducing equipment

A magnetic recording medium and perpendicular magnetic recording technology, applied in the directions of magnetic recording, data recording, recording information storage, etc., can solve the problems of increasing the recording density, reducing the c-axis orientation of the perpendicular magnetic recording film, reducing the resistance to thermal fluctuation, etc. Effects of improved recording and reproduction characteristics

Inactive Publication Date: 2004-04-07
SHOWA DENKO KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using a carbon-containing lower film, because the carbon-containing lower film has an amorphous structure, thereby reducing the c-axis orientation of the perpendicular magnetic recording film and reducing thermal fluctuation resistance, it is difficult to further increase the recording density.

Method used

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  • Magnetic recording medium and producing method thereof, magnetic recording and reproducing equipment
  • Magnetic recording medium and producing method thereof, magnetic recording and reproducing equipment
  • Magnetic recording medium and producing method thereof, magnetic recording and reproducing equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A washed glass substrate (produced by Ohara, Japan, 2.5 inches in outer diameter) was placed in the film forming chamber of a DC magnetron sputtering device (C-3010, produced by Anelva, Japan). Vacuum the film forming chamber until 1×10 -5 After Pa, using 89Co-4Zr-7Nb (Co content 89at%, Zr content 4at%, Nb content 7at%) target, the sputtering method was used to form a 160nm soft magnetic lower film 2 on the glass substrate. A vibrating sample magnetometer (VSM) was used to determine that the product Bs.t (T·nm) of the film's saturation magnetic flux density Bs(T) and the film thickness t (nm) was 200 (T·nm). Next, the substrate was heated to 240° C., and an 8 nm orientation control film was formed on the soft magnetic lower film 2 with a 33Cu-67Hf target. The saturation magnetization Ms of the film was determined to be 100 (emu / cc). Use 65Co-30Cr-5B (Co content 65at%, Cr content 30at%, B content 5at%) target to form a 10nm intermediate film 4, and then use 64Co-17Cr-17Pt-2B...

Embodiment 2-11

[0088] Example 1 was used as the basis for manufacturing magnetic recording media in Examples 2-11, except for the components of the orientation control film listed in Table 2. For comparison, let the intermediate film and the perpendicular magnetic recording film have the same composition and thickness.

[0089] Soft magnetic film

[0090] It is clear from Table 2 that the magnetic recording media of Examples 2-11 showed outstanding recording and reproducing characteristics, and the orientation control film in these magnetic recording media had C11 b The composition of the structure.

Embodiment 12-16

[0092] Example 1 was used as the basis for manufacturing magnetic recording media in Examples 12-16, except for the thickness of the orientation control film as listed in Table 3. For comparison, let the orientation control film have the same composition. In addition, let the soft magnetic lower film, the intermediate film and the perpendicular magnetic recording film have the same composition and thickness.

[0093] Soft magnetic film

Orientation control film

Interlayer

Perpendicular magnetic recording film

Recording / reproduction characteristics

Component

Bs×1

(T·nm)

Component

(at%)

Thickness

(nm)

Component

(at%)

Thickness

(nm)

Component

(at%)

Thickness

(nm)

Error rate

(10 x )

Example 1

CoZrNb

200

33Cu-67Hf

5

65Co-30Cr-5B

10

64Co-17Cr-17Pt-2B

20

-5.8

Example

12

CoZrNb

200

33Cu-67Hf

0....

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Abstract

A magnetic recording medium includes a nonmagnetic substrate on which is provided at least a softly magnetic under-film, an orientation control film that controls an orientation of a film directly above, a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate and a protective film, wherein the orientation control film has a material composition forming a C11b structure. The magnetic recording medium is manufactured by a method including carrying out, in order, at least a step of forming a softly magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film. A magnetic recording and reproduction apparatus includes the magnetic recording medium and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.

Description

Technical field [0001] The present invention relates to a magnetic recording medium with enhanced recording and reproducing characteristics and capable of recording and reproducing high-density information, and to a method for producing the product and a magnetic recording and reproducing device. Background technique [0002] The hard disk drive (HDD) is a magnetic recording and reproducing device whose recording density is currently increasing at a rate of at least 60% per year, and it is said that this trend will continue. In this case, with the development of magnetic recording heads suitable for high recording density, and with the development of magnetic recording media, hard disk drives have also been developed. [0003] The magnetic recording media currently used in magnetic recording and reproducing devices on the market are mainly in-plane magnetic recording media in which the easy magnetization axis in the magnetic film is oriented parallel to the substrate. The easy ax...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/65G11B5/66G11B5/667G11B5/738G11B5/84
Inventor 清水谦治坂胁彰酒井浩志彦坂和志岩崎刚之
Owner SHOWA DENKO KK
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