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Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus

A perpendicular magnetic recording and medium technology, applied in magnetic recording, data recording, recording information storage, etc., can solve the problems of increased transition noise, vibration noise, etc.

Inactive Publication Date: 2015-06-10
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, since the exchange action between particles is reduced in the granular recording layer, there is a tendency for the dispersion (SFD) of the reverse magnetic field accompanying the dispersion of the composition and particle size of the particles to increase, and it has a tendency to cause recording and reproduction characteristics an increased tendency of transition noise and / or vibration noise

Method used

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  • Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus
  • Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus
  • Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus

Examples

Experimental program
Comparison scheme
Effect test

other Embodiment approach

[0043] The magnetic recording and reproducing device related to other embodiments includes: a perpendicular magnetic recording medium, which has: a non-magnetic substrate; an orientation control layer formed on the non-magnetic substrate and made of a nickel alloy having an fcc structure; and an orientation control layer formed on the orientation control layer. A nonmagnetic buffer layer comprising silver with an fcc structure; a nonmagnetic seed formed on the nonmagnetic buffer layer consisting of silver particles with an fcc structure and amorphous germanium grain boundaries disposed between the silver particles layer; a nonmagnetic intermediate layer formed of ruthenium or a ruthenium alloy formed on the nonmagnetic seed layer; and a perpendicular magnetic recording layer formed on the nonmagnetic intermediate layer; Components for recording and components for reproducing recorded information.

[0044] figure 2 A partially exploded perspective view of an example of the ma...

Embodiment 1 and comparative example 1 to 10

[0050] image 3 It is a schematic cross-sectional view showing a perpendicular magnetic recording medium according to Example 1. Figure 4 is a schematic sectional view showing a perpendicular magnetic recording medium related to Comparative Example 1, Figure 5 is a schematic cross-sectional view showing a perpendicular magnetic recording medium related to Comparative Example 2, Image 6 is a schematic cross-sectional view showing a perpendicular magnetic recording medium related to Comparative Example 3, Figure 7 is a schematic sectional view showing a perpendicular magnetic recording medium related to Comparative Example 4, Figure 8 It is a schematic cross-sectional view showing a perpendicular magnetic recording medium according to Comparative Example 5. FIG.

[0051] like image 3 As shown, in the magnetic recording medium according to the embodiment, a non-magnetic glass substrate 1 (amorphous substrate MEL6, 2.5 inches in diameter, manufactured by Konica Minolta C...

Embodiment 2 to 7

[0106] Except for changing the material of the non-magnetic buffer layer to the material shown in Table 3 below, it produced similarly to the medium of Example 1, and obtained the perpendicular magnetic recording medium which concerns on Examples 2-7.

[0107] Composition of Embodiments 2 to 7

[0108] Non-magnetic glass substrate 1 / CrTi adhesion layer 2 / CoFeTaZr soft magnetic layer 3 / NiW orientation control layer 4 / Ag alloy buffer layer 5 / AgGe non-magnetic seed layer 6 / Ru non-magnetic interlayer 7 / CoCrPt-SiO 2 Perpendicular magnetic recording layer 8 / C protective layer 9

[0109] For these media, in the same manner as in Example 1, the crystal orientation, the average particle size and particle size dispersion of the perpendicular magnetic recording layer, and the recording and reproducing characteristics were investigated.

[0110] table 3

[0111]

[0112] As shown in Table 3, it can be seen that the crystal orientation (Δθ50) of the perpendicular magnetic recording la...

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Abstract

According to one embodiment, provided is a perpendicular magnetic recording medium including an orientation control layer formed on a non-magnetic substrate, the orientation control layer consisting of a Ni alloy having fcc structure, non-magnetic buffer layer containing silver having fcc structure, non-magnetic seed layer consisting of Ag particles having fcc structure and amorphous Ge grain boundaries between the Ag particles, non-magnetic intermediate layer consisting of Ru or Ru alloy, and perpendicular magnetic recording layer, wherein the orientation control layer contacts the non-magnetic buffer layer, and the non-magnetic buffer layer contacts the non-magnetic seed layer.

Description

[0001] This application is based on and claims priority from Japanese Patent Application No. 2013-252969 (filing date: December 6, 2013). The entire content of this prior application is hereby incorporated by reference. technical field [0002] The invention relates to a perpendicular magnetic recording medium and a magnetic recording and reproducing device. Background technique [0003] The magnetic recording device (HDD) that uses the computer as the center to record and reproduce information is widely used in home video recorders, audio equipment, car navigation systems, etc. because of its large capacity, low cost, fast data access, and reliability of data storage. Used in various fields. With the expansion of the range of use of HDDs, the demand for high-density storage capacity has also increased, and the development of high-density HDDs has become more and more rapid in recent years. [0004] As a magnetic recording method for HDDs currently on the market, a so-call...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/66G11B5/86
CPCG11B5/7379G11B5/737
Inventor 岩崎刚之
Owner KK TOSHIBA
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