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Thermally-assisted magnetic recording method for writing data on a hard disk medium

一种记录方法、记录信息的技术，应用在记录信息存储、磁记录、记录头的配置/安装等方向，能够解决得不到信噪比等问题，达到高信噪比、高线记录密度的效果

Inactive Publication Date: 2012-09-19
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the past, there has actually been such a problem that even if heat-assisted magnetic recording is performed using a hard disk medium having a magnetic recording layer whose change in coercive force has a large gradient with respect to a change in temperature, high linear recording density cannot be achieved. to a sufficient signal-to-noise ratio

Method used

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  • Thermally-assisted magnetic recording method for writing data on a hard disk medium
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  • Thermally-assisted magnetic recording method for writing data on a hard disk medium

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no. 1 Embodiment approach

[0052] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, refer to Figure 5 , the hard disk drive according to the first embodiment of the present invention will be described. Such as Figure 5 As shown, the hard disk drive includes a plurality of hard disk media 100 and a spindle motor 202 that rotates the plurality of hard disk media 100 . The hard disk drive further includes an assembly carriage device 210 having a plurality of driving arms 211 and a plurality of head gimbal assemblies 212 attached to the front ends of the plurality of driving arms 211 . The head gimbal assembly 212 includes a magnetic head 1 and a suspension 220 that supports the magnetic head 1 .

[0053] The assembly carriage device 210 is a device for positioning the magnetic head 1 on the track of the hard disk medium 100 . The component carriage device 210 also has a pivot bearing shaft 213 and a voice coil motor 214 . The plurali...

no. 1 Embodiment

[0157]

[0158] In the second embodiment, the magnitude of the recording magnetic field applied to the first adjacent region R1 is 2 kOe. Table 4 shows the SNR of the second example.

[0159] [Table 4]

no. 2 Embodiment

[0161]

[0162] In the third embodiment, the magnitude of the recording magnetic field applied to the first adjacent region R1 is 3 kOe. Table 5 shows the SNR of the third example.

[0163] [table 5]

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Abstract

A thermally-assisted magnetic recording method includes first and second steps. The first step applies heat to part of a hard disk medium and forms a moving high-temperature region in a magnetic recording layer of the hard disk medium. The high-temperature region is higher in temperature than a region therearound and has a temperature equal to or higher than the maximum coercivity vanishing temperature of a plurality of magnetic grains contained in the magnetic recording layer. At least one magnetic grain that is adjacent to the rear end of the high-temperature region in the direction of movement of the high-temperature region has a coercivity of a value other than 0. The second step applies a write magnetic field to the hard disk medium such that the write magnetic field applied to the at least one magnetic grain adjacent to the rear end of the high-temperature region is 3 kOe or smaller in magnitude.

Description

technical field [0001] The present invention relates to a heat-assisted magnetic recording method for recording information by applying a recording magnetic field and heat to a hard disk medium, a hard disk drive and a hard disk medium to which the recording method is applied. Background technique [0002] In recent years, in hard disk drives, performance improvements of magnetic heads and hard disk media have been demanded along with higher recording densities. As a magnetic head, a reproducing (reproducing) head having a magnetoresistive element for reading (hereinafter referred to as an MR (Magnetoresistive) element) and an inductive electromagnetic transducer element for writing are stacked on a substrate, and are widely used. Composite thin-film magnetic head with recording head structure. In a hard disk drive, a magnetic head is provided on a slider slightly exposed from the surface of the hard disk medium. [0003] A hard disk medium has a magnetic recording layer i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/66G11B5/48
CPCG11B5/66G11B2005/0021G11B5/65G11B5/6088G11B5/314G11B5/672
Inventor 岛泽幸司水野友人清野浩
Owner TDK CORPARATION
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