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Perpendicular magnetic recording media comprising soft magnetic underlayer with diffusion barrier layer

A magnetic recording medium and soft magnetic bottom layer technology, applied in magnetic recording, magnetic materials of recording carriers, data recording, etc., can solve the problems of reducing the recording characteristics of perpendicular magnetic recording media and reducing the exchange coupling force of magnetic characteristics

Inactive Publication Date: 2007-08-15
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Transition metals such as Mn, Fe, Co, and Ni, which are commonly used in magnetoresistive devices, are diffused in a high-temperature process exceeding about 500°C, which causes a decrease in magnetic properties such as exchange coupling force, and thus reduces the recording properties of perpendicular magnetic recording media

Method used

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  • Perpendicular magnetic recording media comprising soft magnetic underlayer with diffusion barrier layer
  • Perpendicular magnetic recording media comprising soft magnetic underlayer with diffusion barrier layer
  • Perpendicular magnetic recording media comprising soft magnetic underlayer with diffusion barrier layer

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Embodiment Construction

[0028] The present invention will now be described more fully with reference to the accompanying drawings, in which embodiments of the invention are shown. In the drawings, the thicknesses of layers and regions are exaggerated for clarity.

[0029] 2 is a schematic diagram of a perpendicular magnetic recording medium including a soft magnetic underlayer with a diffusion barrier layer.

[0030] Referring to FIG. 2, a perpendicular magnetic recording medium according to an embodiment of the present invention includes a soft magnetic underlayer comprising underlayers 202 and 203, a diffusion barrier layer 204, an AFM layer 205, and a soft magnetic layer sequentially formed on a substrate 201. 206. The recording layer 207 is formed on the soft magnetic layer 206, and an intermediate layer (not shown) may be interposed between the soft magnetic layer 206 and the recording layer 207 to improve crystal orientation characteristics and magnetic properties of the recording layer. Also...

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Abstract

The present invention provides a perpendicular magnetic recording media including a soft magnetic underlayer with a diffusion barrier layer. The perpendicular magnetic recording media includes a soft magnetic substrate and a recording layer formed on the soft magnetic substrate. The soft magnetic substrate includes an underlayer, a substrate, a diffusion barrier layer, and an AFM layer, and a soft magnetic layer. The substrate is formed on the underlayer, and the diffusion barrier layer is formed on the substrate. The AFM layer is formed on the diffusion barrier layer, and the soft magnetic layer is formed on the AFM layer.

Description

technical field [0001] The present invention relates to a perpendicular magnetic recording medium, and more particularly, to a perpendicular magnetic recording medium comprising a soft magnetic underlayer having a diffusion barrier layer for preventing the diffusion of magnetic materials within the soft magnetic underlayer by providing a diffusion barrier layer to improve the exchange coupling characteristics. Background technique [0002] With the increasing demand for ultra-small recording media, magnetic recording media having a high areal recording density are urgently required. While magnetic recording devices utilize lengthwise magnetic recording for magnetic recording in the prior art, perpendicular magnetic recording has been proposed in order to increase areal recording density. Perpendicular magnetic recording magnetizes a magnetic recording layer in a vertical direction to record information. The magnetic recording layer is formed of a magnetic material having h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/667G11B5/70G11B5/706
CPCG11B5/667G11B5/62G11B5/66
Inventor 李在喆尹成龙吴薰翔金雪基
Owner SAMSUNG ELECTRONICS CO LTD