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Perpendicular magnetic recording medium and magnetic storage apparatus

一种垂直磁记录、介质的技术，应用在记录信息存储、磁记录、磁记录层等方向，能够解决介质噪声增大、记录和再现特性劣化等问题

Inactive Publication Date: 2008-02-06
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the second intermediate layer is made of a material with remanent magnetization (ferromagnetic material), this leads to increased media noise
Therefore, at high recording density, there is a problem that recording and reproducing characteristics may be deteriorated due to increased medium noise

Method used

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  • Perpendicular magnetic recording medium and magnetic storage apparatus
  • Perpendicular magnetic recording medium and magnetic storage apparatus
  • Perpendicular magnetic recording medium and magnetic storage apparatus

Examples

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Embodiment Construction

[0019] A description is given below of embodiments of a perpendicular magnetic recording medium and a magnetic storage device according to the present invention with reference to the accompanying drawings.

[0020] FIG. 1 is a sectional view showing a first embodiment of a perpendicular magnetic recording medium according to the present invention. As shown in FIG. 1 , a perpendicular magnetic recording medium 10 has a substrate 11, a soft magnetic underlayer 12, an amorphous layer 13, an orientation control bottom layer 14, an orientation control intermediate layer 15, and a first recording layer 16 stacked continuously in the following order. , the second recording layer 17, the protective layer 18 and the lubricant layer 19. As will be described in more detail later, the orientation control underlayer 14 reduces the orientation or alignment distribution of the easy magnetization axes of the first recording layer 16 and the second recording layer 17, and improves parameters s...

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Abstract

A perpendicular magnetic recording medium is provided with a substrate, a soft magnetic back layer provided on a surface of the substrate, an orientation controlling underlayer provided on the soft magnetic back layer, and a recording layer provided above the orientation controlling underlayer and having axes of easy magnetization approximately perpendicular to the surface of the substrate. The recording layer is made of a ferromagnetic material having an hcp crystal structure. The orientation controlling underlayer is made of a nonmagnetic material having an fcc crystal structure and having NiCr or NiCu as a main component.

Description

technical field [0001] The present invention generally relates to a perpendicular magnetic recording medium and a magnetic storage device, and more particularly, to a perpendicular magnetic recording medium having a bottom layer disposed below a recording layer and consisting of a plurality of layers, and to a perpendicular magnetic recording medium having such a magnetic storage device. Background technique [0002] Recently, due to the high data transmission capability and large storage capacity of magnetic storage devices, magnetic storage devices are no longer used only in personal computers and servers, but in navigation systems for vehicles, portable music players, HDD recorders, There is an increasing demand for portable phones and the like. Therefore, there is a need to further increase the storage capacity and recording density of magnetic storage devices. [0003] Magnetic storage devices generally use magnetic recording media using in-plane or longitudinal magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/66G11B5/667G11B5/70G11B5/716G11B5/73
CPCG11B5/65G11B5/82G11B5/66G11B5/7325G11B5/7371G11B5/7377G11B5/737G11B5/7373G11B5/667G11B5/1278G11B5/676G11B2005/0029Y10S428/90G11B5/678
Inventor 乡家隆志
Owner RESONAC HOLDINGS CORPORATION
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