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Preparation method of metal permanent magnet thin film with multi-layer thin film structure

A multi-layer film and metal technology, which is applied in the field of magnetic recording, information storage and reproduction information recording, and metal permanent magnetic film production, can solve the problems of poor hard magnetic properties, achieve good magnetic properties, simple equipment, and improve production efficiency Effect

Active Publication Date: 2015-04-08
NANTONG WANBAO IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, due to the different deposition difficulties of Sm and Co ions, at the same deposition potential, even when the concentration ratio of Sm ions and Co ions is 10, only SmCo alloy with Sm content of 6.0wt% can be obtained. Poor magnetic properties

Method used

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  • Preparation method of metal permanent magnet thin film with multi-layer thin film structure
  • Preparation method of metal permanent magnet thin film with multi-layer thin film structure
  • Preparation method of metal permanent magnet thin film with multi-layer thin film structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Prepare electrolyte solution I: Dissolve samarium chloride, glycine and boric acid in distilled water to form electrolyte solution I. The concentrations of samarium chloride, glycine and boric acid in electrolyte solution I are 0.10mol / L and 0.10mol / L respectively and 0.05mol / L. Then, adjust the pH value of the electrolyte I to 2.0 with ammonia water or dilute hydrochloric acid.

[0021] (2) Configure electrolyte II: dissolve cobalt sulfamate, ammonium citrate and glycine in distilled water to form electrolyte II, the concentrations of cobalt sulfamate, ammonium citrate and glycine in electrolyte II are 0.10mol / L respectively , 0.20mol / L and 0.10mol / L. Then, adjust the pH value of electrolysis II to 4.0 with ammonia water or dilute hydrochloric acid.

[0022] (3) HCl, H with a volume ratio of 1:0.5~2:4~7 2 o 2 and H 2 O is mixed to form a cleaning solution, and the polished red copper sheet or brass sheet is cleaned for 30-50 minutes under ultrasonic conditions...

Embodiment 2

[0034] (1) Prepare electrolyte solution I: Dissolve samarium chloride, glycine and boric acid in distilled water to form electrolyte solution I. The concentration of samarium chloride, glycine and boric acid in electrolyte solution I are 0.10mol / L and 0.11mol / L respectively and 0.05mol / L. Then, adjust the pH value of the electrolyte I to 2.5 with ammonia water or dilute hydrochloric acid.

[0035] (2) Configure electrolyte II: dissolve cobalt sulfamate, ammonium citrate and glycine in distilled water to form electrolyte II, the concentrations of cobalt sulfamate, ammonium citrate and glycine in electrolyte II are 0.10mol / L respectively , 0.25mol / L and 0.10mol / L. Then, adjust the pH value of electrolysis II to 5.0 with ammonia water or dilute hydrochloric acid.

[0036] (3) HCl, H with a volume ratio of 1:0.5~2:4~7 2 o 2 and H 2 O is mixed to form a cleaning solution, and the polished red copper sheet is cleaned for 30-50 minutes under ultrasonic conditions.

[0037] (4) ...

Embodiment 3

[0042] (1) Prepare electrolyte solution I: Dissolve samarium chloride, glycine and boric acid in distilled water to form electrolyte solution I. The concentrations of samarium chloride, glycine and boric acid in electrolyte solution I are 0.10mol / L and 0.12mol / L respectively and 0.05mol / L. Then, adjust the pH value of the electrolyte I to 2.0 with ammonia water or dilute hydrochloric acid.

[0043] (2) Configure electrolyte II: dissolve cobalt sulfamate, ammonium citrate and glycine in distilled water to form electrolyte II, the concentrations of cobalt sulfamate, ammonium citrate and glycine in electrolyte II are 0.10mol / L respectively , 0.30mol / L and 0.10mol / L. Then, adjust the pH value of electrolysis II to 6.0 with ammonia water or dilute hydrochloric acid.

[0044] (3) HCl, H with a volume ratio of 1:0.5~2:4~7 2 o 2 and H 2 O is mixed to form a cleaning solution, and the polished brass sheet is cleaned for 30-50 minutes under ultrasonic conditions.

[0045] (4) Elec...

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Abstract

The invention relates to a preparation method of a metal permanent magnet thin film with a multi-layer thin film structure, relating to the technical field of production of metal permanent magnet thin films with multi-layer film structures, which are used for magnetic recording, information storage and reproduced information recording. According to the preparation method disclosed by the invention, a platinum electrode is taken as a counter electrode, a polished copper sheet or a brass sheet is taken as a working electrode, a saturated calomel electrode is taken as a reference electrode, and an Sm metal layer and a Co metal layer are sequentially deposited on the surface of the copper sheet or the brass sheet in an electrolyte. According to the preparation method disclosed by the invention, the required equipment is simple, the production process is easy to operate, the production efficiency can be greatly improved, and the preparation method is suitable for industrial large-batch production; and by controlling deposition time, the controllable regulation of the thickness of the Sm film layer can be realized, thus the Sm content in the thin film can be increased so as to be favorable for obtaining better magnetic performance.

Description

technical field [0001] The invention relates to the technical fields of magnetic recording, information storage and reproduction information recording, etc., in particular to the technical field of production of a metal permanent magnet film with a multilayer film structure. Background technique [0002] With the rapid development of the information industry, the volume of the recording medium for storing information is getting smaller and higher, and the density is getting higher and higher. However, as the magnetic recording density increases, the volume of the magnetic medium corresponding to each recording bit becomes smaller. When the grain size of the magnetic recording medium is small to a certain extent, thermal stability problems will occur and cause the recording bit to self-demagnetize. , resulting in the failure of the recorded information, that is, the superparamagnetic phenomenon. Therefore, in order to maintain the thermal stability of the recording medium an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/10C25D3/54C25D3/12
Inventor 吴琼周连明曹阳张朋越
Owner NANTONG WANBAO IND