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Magnetic recording medium, method for manufacturing magnetic recording medium and magnetic recording and reproducing apparatus

A technology of magnetic recording medium and magnetic layer, applied in the direction of magnetic recording, magnetic recording layer, base layer of recording layer, etc., can solve the problem of deteriorating the corrosion resistance of magnetic recording medium, etc.

Active Publication Date: 2018-06-29
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, in the case of a magnetic layer with a granular structure, it is also known that Co atoms and the like contained in the magnetic layer are easily precipitated, so that the corrosion resistance of the magnetic recording medium can be significantly deteriorated.

Method used

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  • Magnetic recording medium, method for manufacturing magnetic recording medium and magnetic recording and reproducing apparatus
  • Magnetic recording medium, method for manufacturing magnetic recording medium and magnetic recording and reproducing apparatus
  • Magnetic recording medium, method for manufacturing magnetic recording medium and magnetic recording and reproducing apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] A magnetic recording medium was fabricated as follows.

[0107] The cleaned outer diameter of 2.5 inches glass non-magnetic substrate 1 (manufactured by HOYA company) is placed in the film formation chamber of DC magnetron (magnetron) sputtering device C-3040 (manufactured by ANELVA company), and the The film forming chamber is exhausted to an ultimate vacuum of 1×10 －5 After Pa, an adhesion layer with a thickness of 10 nm was formed on the non-magnetic substrate 1 using a Cr-50Ti {the content of Ti is 50 at %, and the remainder is Cr} target material.

[0108] Next, use a Co-20Fe-5Zr-5Ta {the content of Fe is 20at%, the content of Zr is 5at%, the content of Ta is 5at%, and the rest is Co} target material, and the temperature of the non-magnetic substrate 1 is 100 °C or lower, a soft magnetic layer with a thickness of 25 nm is formed on the adhesive layer. Then, using a Ru target, a Ru layer with a thickness of 0.7 nm was formed on the soft magnetic layer. Next, usin...

Embodiment 2

[0119] A magnetic recording medium 10 was obtained in the same manner as in Example 1, except that a Co10Cr20Pt14Ti target was used to form a magnetic layer having a granular structure composed of 93(Co12Cr22Pt7Ti)-7(TiC) when forming the second magnetic layer 4b.

Embodiment 3

[0121] In addition to using the Co10Cr20Pt14Al target to form the second magnetic layer 4b formed by 97 (Co12Cr22Pt2Al)-3 (Al 4 C 3 ) except for the magnetic layer having a granular structure composed of ), a magnetic recording medium 10 was obtained in the same manner as in Example 1.

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Abstract

A magnetic recording medium includes a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protective layer arranged on a non-magnetic substrate. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer from the non-magnetic substrate side in this order. The second magnetic layer contains a magnetic grain and is locatedat a most superficial side. The first magnetic layer has a granular structure that contains an oxide in a grain boundary. The second magnetic layer has a granular structure that contains a carbide ofan element contained in the magnetic grain in a grain boundary.

Description

technical field [0001] The present invention relates to a magnetic recording medium, a manufacturing method of the magnetic recording medium, and a magnetic recording and reproducing device. Background technique [0002] The recording density of a hard disk drive (HDD: Hard Disk Drive), which is a type of magnetic recording and reproducing apparatus, is rapidly increasing at present, and this trend will continue in the future. Therefore, development of a magnetic recording medium and a magnetic head for recording suitable for high recording density is underway. [0003] At present, as far as the magnetic recording medium mounted on the magnetic recording and reproducing apparatus sold on the market is concerned, it is a so-called vertical magnetic layer having an easy axis of magnetization mainly perpendicular to the surface of the non-magnetic substrate. perpendicular magnetic recording media. Here, the vertical magnetic layer has a hcp structure, and its (0002) plane is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/73G11B5/706G11B5/72G11B5/84
CPCG11B5/70605G11B5/70626G11B5/72G11B5/84G11B5/65G11B5/66C23C14/08C23C14/185C23C14/35C23C28/00C23C28/322C23C28/345C23C28/3455C23C28/321G11B5/82C23C14/0036C23C14/351G11B5/851G11B5/672
Inventor 长谷川浩太大桥荣久
Owner RESONAC CORPORATION
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