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Polycrystalline structure and its production method

A technology of polycrystalline structure and crystal, which is applied in the fields of record carrier manufacturing, nanostructure application, inductance/transformer/magnet manufacturing, etc. It can solve the problems of not being able to enjoy the diffusion of non-magnetic atoms

Inactive Publication Date: 2005-06-01
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, continuous layers of polycrystalline structures made of ordered alloys cannot enjoy the aforementioned diffusion of nonmagnetic atoms along grain boundaries

Method used

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  • Polycrystalline structure and its production method
  • Polycrystalline structure and its production method
  • Polycrystalline structure and its production method

Examples

Experimental program
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Embodiment Construction

[0034] figure 1It is used to illustrate the configuration of a hard disk drive (HDD) 11 as a specific example of a magnetic recording medium drive or storage device. The HDD 11 includes a box-shaped main housing 12 defining, for example, a flat parallelogram-shaped inner space. At least one magnetic recording disk 13 is accommodated in an inner space within the main casing 12 . The magnetic recording disk 13 is mounted on a drive shaft of a spindle motor 14 . Make the spindle motor 14 drive the magnetic recording disc 13 to rotate at a high speed, such as 7200rpm, 10000rpm and so on. A cover, not shown, is attached to the main housing 12 to define a closed interior space between the main housing 12 and therebetween.

[0035] A carriage 16 is also installed in the inner space of the main housing 12 to swing around the vertical support shaft 15 . The carriage 16 includes a rigid swing arm 17 extending in the horizontal direction from a vertical support shaft 15 and an elasti...

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Abstract

A polycrystalline structure (24) has a base layer (31) stretching over a substrate (23). Small magnetic crystalline particles (32) are scatterlingly present on the base layer (31). The magnetic crystalline particles (32) are formed of an ordered alloy and spaced from one another on the base layer (31). Since sufficient crystal magnetic isotropy energy of the magnetic crystalline particles (32) is ensured, the magnetization in the magnetic crystalline particles (32) is maintained reliably even if the magnetic crystalline particles (32) are further atomized, and the spatial intervals between the magnetic crystalline particles (32) is ensured. The magnetic crystalline particles (32) are independent of one another. The magnetic interaction between adjacent magnetic crystalline particles (32) are completely cut. The magnetic domain of each magnetic crystalline particle (32) is established.

Description

technical field [0001] The present invention relates to a polycrystalline structure generally used for a magnetic recording layer of a magnetic recording medium such as a hard disk and a method of manufacturing the same. Background technique [0002] Continuous layers of polycrystalline structure are commonly used for magnetic recording layers in the technical field of magnetic recording media. The continuous layer of polycrystalline structure includes tiny Co alloy grains formed on the surface of the base layer based on epitaxy. The continuous layer of polycrystalline structure allows Cr atoms to diffuse along the grain boundaries between adjacent Co alloy grains. Cr atoms form nonmagnetic walls between adjacent Co alloy grains to reliably prevent magnetic interaction between adjacent Co alloy grains. Magnetic domains are built into individual grains. As is well known, fine Co alloy grains are used to reliably reduce noise in read signals regarding magnetic information. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/64G11B5/65G11B5/66G11B5/738G11B5/851H01F1/00H01F10/00H01F10/08H01F41/18H01F41/30
CPCB82Y25/00B82Y40/00H01F1/0063H01F1/009H01F10/007H01F41/18H01F41/301H01F10/123Y10T428/2982Y10T428/24612G11B5/678G11B5/676G11B5/674G11B5/62C23C14/08H01F10/08B32B3/00
Inventor 向井良一
Owner RESONAC HOLDINGS CORPORATION
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