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Cobalt-vanadium super-high density vertical magnetic recording medium and method for making same

A perpendicular magnetic recording, ultra-high density technology, applied in magnetic recording, data recording, recording information storage, etc., can solve the problem of low thermal stability of the medium, achieve simple equipment, good industrial production potential, and easy operation of the production process Effect

Inactive Publication Date: 2010-06-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The noise of longitudinal magnetic recording media mainly comes from the broadening of the transition region caused by the demagnetization field, which depends on the remanence thickness product of the medium (M r δ) and coercivity (H c ) ratio, in order to reduce the noise, the thickness of the medium is reduced from hundreds of nanometers to more than ten nanometers, and H c It also increases from hundreds of Oe to several thousand Oe, but if the dielectric layer continues to become thinner, it will produce superparamagnetic phenomenon, which will reduce the thermal stability of the medium

Method used

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  • Cobalt-vanadium super-high density vertical magnetic recording medium and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Preparation of Co with a thickness of 600nm at 200°C 87 V 13 film

[0019] 1) Clean the glass substrate ultrasonically with alcohol, acetone, and distilled water, then soak it in chromic acid for 12 hours, then wash it with distilled water, and finally dry it with a nitrogen gun. Put the cleaned glass substrate into the sputtering chamber, install the cobalt target at the same time, place some small vanadium chips on the cobalt target to adjust the content of vanadium, so that the composition of the film is Co 87 V 13 ;

[0020] 2) The sputtering chamber is pumped until the background vacuum is better than 5×10 -4 Pa;

[0021] 3) Heating the sputtering chamber to keep the substrate temperature at 200°C;

[0022] 4) Introduce Ar gas, keep the air pressure at 0.6-0.7Pa, and the target distance is 7cm. Then start the pre-sputtering for 30 minutes to clean the target surface, and then use the power of 300W to sputter and deposit for 60 minutes. Sputter and ...

Embodiment 2

[0023] Example 2: Preparation of Co with a thickness of 600nm at 250°C 87 V 13 film

[0024] The same procedure as in Example 1 was adopted, wherein the sputtering temperature was 250°C. Different temperatures have certain effects on the uniformity and grain size of the film structure.

Embodiment 3

[0025] Example 3: Preparation of Co with a thickness of 600nm at 300°C 87 V 13 film

[0026] The same procedure as in Example 1 was adopted, wherein the sputtering temperature was 300°C. Different temperatures have certain effects on the uniformity and grain size of the film structure.

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Abstract

The invention relates to a Co-V vertical magnetic recording medium with ultra-high density and a preparation method, which is characterized in that: the magnetic recording medium is a polycrystalline organization with HCP structure; the Co atom takes account for thirteen percent to twenty four percent; the thickness is from two hundred to six hundred nm; a rinsed glass substrate is put into a sputtering chamber firstly; then a cobalt target is positioned and a vanadium tablet is positioned on the cobalt target; the air is pumped out of the sputtering chamber until the background vacuum excels5 x 10<-4>Pa; the sputtering chamber is heated under the temperature from two hundred to three hundred degree; then Ar gas is filled and the air pressure remains from 0.6 to 0.7 pa; the pre-burn timeis at least 10 min; then the target surface is cleaned, finally twenty to sixty min can be spent on the sputtering deposition. The invention has the advantages of providing a Co-v vertical magnetic recording medium with ultra-high density used for the high density vertical magnetic recording and the preparation method with high magnetocrystalline anisotropy, having good vertical magnetic recording property and excellent chemical stability, which can meets the requirements of the low noise and high thermal stability needed by the vertical magnetic recording medium.

Description

technical field [0001] The invention relates to a magnetic recording medium, in particular to an ultra-high-density perpendicular magnetic recording medium using cobalt vanadium material and a preparation method thereof. Background technique [0002] Since 1956, IBM has manufactured a storage capacity of 5MB and a recording density of 2Kbit / in 2 Since the first hard disk, the recording density of the hard disk has been increasing at a rate of 100% every year. Magnetic recording is the core technology of information storage, and the development of magnetic recording has higher and higher requirements for magnetic recording media. At present, the recording method of the magnetic medium layer of commercial hard disks is mainly longitudinal magnetic recording. In order to further increase the recording density, its signal-to-noise ratio (SNR) and magnetocrystalline anisotropy (K u ). The noise of longitudinal magnetic recording media mainly comes from the broadening of the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/64G11B5/851
Inventor 王翠萍李甜刘兴军黄艺雄张锦彬施展马云庆
Owner XIAMEN UNIV
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