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Iron-cobalt alloy nano linear array permanent-magnetic film material

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: 2006-11-22
NANJING UNIV
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  • Abstract
  • Description
  • 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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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

Iron-cobalt alloy nanowire array permanent magnet thin film material, iron-cobalt alloy nanowire array electrochemically deposited in the electrochemical anodized alumina nanohole template, the diameter of the iron-cobalt alloy nanowire is 10nm to 50nm, iron-cobalt The composition of the alloy is Co x Fe 1-x , 0.20≤x≤0.60. The invention utilizes an electrochemical anodic oxidation method to prepare aluminum oxide nano hole templates, and obtains a high-performance iron-cobalt alloy nanowire array permanent magnetic thin film material by electrochemically depositing an iron-cobalt alloy nanowire array and low-temperature annealing. Especially when the content of cobalt is 30%-40%, and the diameter of the nanowire is 10nm-22nm, the performance is the best.

Description

1. Technical field [0001] The invention relates to the composition of an iron-cobalt alloy nano wire 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 resistance. At present...

Claims

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Application Information

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