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Magnetic recording medium

A technology of magnetic recording medium and magnetic recording layer, applied in the directions of magnetic recording, magnetic recording layer, data recording, etc., can solve the problems of low coercive force, low perpendicular anisotropy energy constant, and reduction of perpendicular orientation of perpendicular magnetic recording layer, etc.

Inactive Publication Date: 2004-04-07
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the degree of perpendicular orientation of the perpendicular magnetic recording layer is reduced, thereby providing a low perpendicular anisotropy energy constant Ku and low coercive force

Method used

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Embodiment Construction

[0028] Hereinafter, a magnetic recording medium according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiments of the present invention, a magnetic recording medium using a perpendicular magnetic recording method is described. However, the present invention is also applicable to longitudinal magnetic recording methods. Here, it will be noted that all recording methods will be within the scope of the present invention.

[0029] A magnetic recording medium having a single magnetic layer and a magnetic recording medium having two magnetic layers according to the present invention are shown in FIGS. 4 to 6 . As shown in 4, in the perpendicular magnetic recording medium having a single layer, between the perpendicular magnetic recording layer 35 and the base material 31, the first lower layer 32 having a single magnetic layer, composed of metal, and composed of non-metal is sequenti...

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Abstract

A magnetic recording medium including a magnetic recording layer and a substrate that supports the magnetic recording layer is provided. At least two underlayers including a nonmetallic underlayer are placed between the magnetic recording layer and the substrate. The perpendicular magnetic recording medium uses a double-layered or tri-layered underlayer. Accordingly, a perpendicular magnetic recording layer can have a high perpendicular magnetic anisotropic energy constant Ku due to a third underlayer and have small crystal grains and a small exchange coupling due to a second underlayer below the third underlayer. Thus, the perpendicular magnetic recording layer can have a good thermal stability, high-density recording characteristics, and excellent SNR characteristics.

Description

technical field [0001] The present invention relates to a magnetic recording medium capable of recording data at high density, and more particularly to a recording medium having a magnetic recording layer having high thermal stability, high density recording characteristics and excellent SNR characteristics. Background technique [0002] A hard disk drive (HDD), which is a representative magnetic data storage device and brings about a rapid rise in recording density, currently employs a longitudinal magnetic recording method in which a ring head and a longitudinal magnetic recording medium are involved. However, the conventional longitudinal magnetic recording method encounters a limitation in increasing the recording density due to the thermal instability of the recording medium, and a new recording method of the perpendicular magnetic recording method is currently being actively developed because the perpendicular magnetic recording method is expected to improve the recordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/738G11B5/667G11B5/73G11B5/84
CPCG11B5/7325G11B5/7369G11B5/84
Inventor 吴薰翔李丙圭
Owner SAMSUNG ELECTRONICS CO LTD
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