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Iron-cobalt alloy nano linear array permanent-magnetic film material and its preparation

A nanowire array, iron-cobalt alloy technology, applied in the application of magnetic films to substrates, and the magnetism of inorganic materials, can solve the problems of ignoring permanent magnetic film materials

Inactive Publication Date: 2004-09-15
NANJING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the research on permanent magnet thin film materials such as rare earth permanent magnets, transition metal permanent magnets and ferrite permanent magnets mentioned above are all based on the large magnetocrystalline anisotropy of these materials, while ignoring the use of shape anisotropy Obtain good permanent magnet thin film materials

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  • Iron-cobalt alloy nano linear array permanent-magnetic film material and its preparation
  • Iron-cobalt alloy nano linear array permanent-magnetic film material and its preparation
  • Iron-cobalt alloy nano linear array permanent-magnetic film material and its preparation

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing and by embodiment the present invention will be further described:

[0013] Iron-cobalt alloy Co x Fe 1-x (0.20≤x≤0.60) formula has a certain range, and the present invention is especially formulated in the range of 0.25≤x≤0.40, the ratio of performance and cost of this ratio is the most economical, and there is no significant difference in performance.

[0014] The invention is manufactured by the following method: the aluminum oxide nano hole template is prepared by electrochemical anodic oxidation, the electrolytic solution is 2%-15% sulfuric acid aqueous solution, the voltage is 10V-27V, and phosphoric acid is used to expand the pores. Using nanoporous alumina as a template, the electrodeposition solution is an aqueous solution containing iron ions and cobalt ions, and Co is obtained by alternating current electrochemical deposition. x Fe 1-x (0.20≤x≤0.60) alloy nanowire arrays followed by annealing. The electrodepo...

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Abstract

In the invention, pore templet in Nano alumina is prepared by method of electrochemic anode oxidation, and nano line array of ferrocobalt is prepared by method of electrochemic deposition. Diameter of line array of ferrocobalt is in 10nm-50nm, constituent of ferrocobalt is as CoxFe1-x , 20 more than or equal to 20 and less than or equal to 0.60. low temperature annealing of Nano line array of ferrocobalt obtained from electrochemic deposition obtains thin film material of permanent magnetism, performances of which are best when content of cobalt is 30%-40%, and diameter of Nano line is as 10nm-22nm.

Description

1. Technical field [0001] The invention relates to a composition and a preparation method of an iron-cobalt alloy nanowire array permanent magnet thin film material. 2. Background technology [0002] Permanent magnetic thin films can be widely used in micro-motor systems, integrated electronic devices, magnetic heads and other fields, and use permanent magnetic thin films to form micro-motors, braking devices, micro-pumps and other devices. With the miniaturization of electronic devices, research on permanent magnetic thin films has received widespread attention and developed rapidly. The selection criteria for permanent magnetic films are 1) good magnetic properties: large magnetic energy product, high Curie temperature, H c and B r Has a low temperature coefficient. 2) It can be obtained by sputtering deposition and chemical deposition, and finally can be obtained by chemical deposition. 3) It has good environmental stability: good mechanical properties and oxidation r...

Claims

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Application Information

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IPC IPC(8): H01F1/04H01F41/14
Inventor 唐少龙陈微姬广斌李震都有为
Owner NANJING UNIV
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