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Magnetic recording medium and magnetic storage apparatus

A magnetic recording medium and magnetic layer technology, which is applied in the direction of recording information storage, magnetic recording, magnetic recording layer, etc., can solve problems such as difficult to improve the recording density of hard disk devices, and achieve the effect of high signal-to-noise ratio

Inactive Publication Date: 2018-07-03
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is difficult to increase the recording density of hard disk devices using existing recording methods

Method used

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  • Magnetic recording medium and magnetic storage apparatus
  • Magnetic recording medium and magnetic storage apparatus
  • Magnetic recording medium and magnetic storage apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] The magnetic recording medium 100 was produced (see figure 1 ). The manufacturing steps of the magnetic recording medium 100 will be described below.

[0112] On a glass substrate 1 having an outer diameter of 2.5 inches, a Cr-50at%Ti (alloy with a Cr content of 50at% and a Ti content of 50at%) was formed with a film thickness of 25 nm as a seed layer, and then heated at 300° C. Next, the substrate 1 is heated. Next, as the alignment control layer 6, a Cr-5at%Mn (alloy containing 95 at% of Cr and 5 at% of Mn) film with a film thickness of 20 nm was formed. Next, a W layer with a thickness of 20 nm was formed as the second underlayer 5 , and W-20TaN (with a W content of 80 mol % and TaN) was formed with a thickness of 20 nm as the first underlayer 4 on the second underlayer 5 . 20 mol% alloy) film. Next, an MgO film having a thickness of 2 nm was formed as the barrier rib layer 7 . After that, the substrate 1 was heated at 580° C. to form (Fe-45at%Pt)-12mol%SiO as t...

Embodiment 2～5

[0114] A magnetic recording medium was produced in the same manner as in Example 1, except that the composition of the first underlayer 4 was changed to W-25TaN, W-30TaN, W-50TaN, and W-75TaN, respectively.

Embodiment 6～16

[0116] Except changing the composition of the first bottom layer 4 to W-25ZrN, W-25TiN, W-25VN, W-25NbN, W-25AlN, W-25BN, W-25Si respectively 3 N 4 , W-25HfN, W-25CrN, W-25MoN, W-25WN, it carried out similarly to Example 1, and produced the magnetic recording medium.

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Abstract

A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L10 type crystal structure with a (001) orientation, wherein the substrate, the underlayer, and the magnetic layer are stacked in this order, the underlayer includes a first underlayer, the first underlayer is a crystalline layer that includes a material containing W as a main component and a nitride whose content ranges from 1 mol % to 80 mol %, and the nitride includes one or more elements selected from a group consisting of Al, B, Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.

Description

technical field [0001] The present invention relates to a magnetic recording medium and a magnetic storage device. Background technique [0002] In recent years, there has been an increasing demand for larger capacity of hard disk devices. [0003] However, it is difficult to increase the recording density of the hard disk device using the existing recording method. [0004] The heat-assisted magnetic recording method has been extensively studied as a next-generation recording method, and is also one of the technologies attracting attention. The thermally assisted magnetic recording method is a method of locally heating the surface of the magnetic recording medium by irradiating a near-field light from the magnetic head to the magnetic recording medium to reduce the coercive force of the magnetic recording medium for How write operations are logged. [0005] When a high-Ku material is used as the material constituting the magnetic layer, KuV / kT becomes large. Here, Ku is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/706G11B5/725G11B5/738G11B5/84
CPCG11B5/70605G11B5/70626G11B5/725G11B5/73G11B5/8404G11B5/7377G11B5/737G11B5/7373G11B11/10589G11B5/851
Inventor 福岛隆之丹羽和也张磊村上雄二柴田寿人山口健洋神边哲也
Owner RESONAC HOLDINGS CORPORATION