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Magnetic storage medium and its prepn

A magnetic storage and medium technology, applied in information storage, recording information storage, magnetic recording, etc., can solve the problems of uneven magnetic particle particles and storage density that cannot be further improved, and achieve uniform and controllable particles, increased storage density, and correction The effect of stamina improvement

Inactive Publication Date: 2007-03-28
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the inhomogeneity of the above-mentioned magnetic particles and the deficiency that the storage density cannot be further improved, and to provide a high storage density magnetic storage device with uniform magnetic particles and no superparamagnetic phenomenon due to size reduction. storage medium

Method used

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  • Magnetic storage medium and its prepn
  • Magnetic storage medium and its prepn
  • Magnetic storage medium and its prepn

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Embodiment Construction

[0021] Please refer to FIG. 1 , which is a porous alumina template 10 selected for preparing magnetic storage materials in the present invention. The porous alumina template 10 can first pass through C 2 f 6 The gas selectively etches the surface of the aluminum substrate to generate nano-dots, and then the aluminum substrate is placed in a high-temperature oven with a high-oxygen flow chamber, and oxidized for a certain period of time to form a micropore array 12 . The pore size of the microhole array is consistent, which is 1 to 5 nanometers, preferably 1 to 3 nanometers; the distance between the microholes is 2 to 10 nanometers, preferably 2 to 5 nanometers; the depth of each microhole is 2.5 to 7.5 Nano. The microhole array 12 is basically columnar, uniformly distributed and arranged in an orderly manner, and the holes are independent of each other, so the interlacing phenomenon will not occur due to the inclination of the microholes. Optionally, the gas for etching the...

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Abstract

The present invention provides one kind of magnetic storage medium comprising porous alumina template with homogeneous pores and magnetic material deposited inside the pores. The magnetic material contains CoCrPtX or CoCrPtTaX alloy, where X is one of B, N and C, and the magnetic particles have diameter of 1-5 nm and interval of 2-10 nm. The magnetic storage medium of the present invention is limited by pores in columns with relatively high vertical magnetism, axial coercive force of 8000-20000 Qe, no superparamagnetism and storing density up to 6.45E13 bit / sq in. The preparation process of the magnetic storage medium is also provided.

Description

【Technical field】 [0001] The invention relates to a magnetic storage medium and a preparation method thereof, in particular to a nanoscale magnetic storage medium and a preparation method thereof. 【Background technique】 [0002] With the development of modern information science and technology, higher requirements are placed on the storage capacity of magnetic storage media such as magnetic disks and magnetic tapes. The key to increasing the storage capacity in a limited area is to increase the storage density of storage materials. As a high-density magnetic storage medium, the medium is required to have high magnetization, large coercive force, good stability and sufficient mechanical strength. [0003] In order to increase the information storage density of the storage medium, it is necessary to find a way to increase the in-plane coercive force of the medium while reducing the grain size of the medium. The fabrication of small-sized magnetic particles is usually achieved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/62G11B5/84H01F1/01
Inventor 陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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