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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 the direction of magnetic recording, data recording, recording information storage, etc., can solve the problem of low thermal stability of the medium, and achieve simple equipment, controllable grain size, and high magnetic crystal density. Anisotropic effect

Inactive Publication Date: 2008-05-07
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 discloses a cobalt vanadium ultra-high density perpendicular magnetic recording medium and a preparation method thereof, relating to a magnetic recording medium. Provide a high magnetocrystalline anisotropy, good perpendicular magnetic recording characteristics and excellent chemical stability, which can meet the requirements of low noise and high thermal stability required by perpendicular magnetic recording media, and can be used for high-density perpendicular magnetic Recorded cobalt vanadium ultra-high density perpendicular magnetic recording medium and its preparation method. It is a polycrystalline structure with HCP structure, the atomic percentage of vanadium is 13%-24%, and the thickness is 200-600nm. Put the cleaned glass substrate into the sputtering chamber, install the cobalt target, and put the vanadium sheet on the cobalt target; pump the air to the sputtering chamber until the background vacuum is better than 5×10-4Pa; heat the sputtering chamber at a temperature of 200-300°C; Inject Ar gas, keep the pressure at 0.6-0.7Pa, pre-sputter for at least 10 minutes, clean the target surface, and finally sputter and deposit for 20-60 minutes.

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 Applications(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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