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Magneto-optical recording target material and its preparing process

A technology of magneto-optical recording and production process, applied in the fields of magnetic recording, data recording, recorded information storage, etc., which can solve the problems of non-centralized research and variable alloy composition.

Inactive Publication Date: 2002-05-01
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on this aspect, and most of the doping is to improve the oxidation resistance and corrosion resistance of materials. There are many studies on diversified alloys, but the alloy composition changes, and there is no centralized research.

Method used

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  • Magneto-optical recording target material and its preparing process
  • Magneto-optical recording target material and its preparing process
  • Magneto-optical recording target material and its preparing process

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Embodiment Construction

[0012] The process of preparing the magneto-optical target is as follows: Process 1 raw material treatment and ingredients: surface chemical treatment of industrial pure iron, and then refining terbium, light rare earth and iron in a magnetic suspension furnace; at the same time, the cobalt is also properly surface treated ; Finally, dosing under the protection of inert gas: The dosing elements and components of various targets are consistent with the above-mentioned composite targets. The base target alloy is smelted by the magnetic levitation melting technology, and the alloy composition of the base target 1 is iron-cobalt (FeCo) alloy. Cut pure terbium 2 (Tb) and light rare earth 3 (LRE) wires into segments or disks, and symmetrically inlay them in the circular area with the largest etching of the iron-cobalt alloy-based target 1 to make a composite target, such as figure 1 with 2 As shown, the composition of the target can be changed by adjusting the number and position o...

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Abstract

A target material for magneto-optical record (optical disk or magneto-optical disk) is based on the principle that the light- or medium-weight rare-earth elements have high saturation magnetization intensity, magnetocrystalline anisotropy and magneto-optical effect. It is prepared through magnetic suspension smelting of FeCo alloy as basic target alloy, linearly cutting the pure terbium and light-weight rare-earth element to obtain sectorial or circular sheets, symmetrically inlaying them on said basic target. Its advantages are high uniformity, low cost and high efficiency.

Description

[0001] Field [0002] The invention belongs to the technical field of manufacturing optical discs and magneto-optical discs. Background technique [0003] Information storage technology is the backbone of all high-tech fields. With the astonishing increase in the amount of information, it is imperative to research and develop large-capacity storage and retrieval systems. Due to the advantages of high storage density, fast data transmission, and long storage life, optical discs have been rapidly developed as external storage devices for computers. However, optical discs can only be burned once, and cannot be rewritten and reused like magnetic storage. It is suitable for for long-term data storage. The disk can be erased and written repeatedly, but the storage capacity is small. It is in this situation that magneto-optical disks become a new generation of optical disks. Compared with optical disks and magnetic disks, they not only have the advantages of high density and large ...

Claims

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Application Information

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IPC IPC(8): G11B5/62G11B5/84
Inventor 张喜燕周世杰刘志农
Owner SOUTHWEST JIAOTONG UNIV
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