LC resonant giant magneto-impedance effect composite wire and its preparing process

A technology of giant magneto-impedance and composite wire, which is applied in parts of electromagnetic equipment, magnetic recording head, measurement of magnetic variables, etc., can solve problems such as difficult application, and achieve the effect of low cost, simple process and stable product performance.

Inactive Publication Date: 2008-01-16
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still problems with their sensitivity, anti-interference, repeatability, miniaturization, etc., making it difficult to apply this technology to products

Method used

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  • LC resonant giant magneto-impedance effect composite wire and its preparing process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In the first step, the metal wire 1 is a beryllium copper wire with a diameter of 90 μm and a length of 4 cm, and the isolation layer 2 is polyester paint with a thickness of 5 μm; in the third step, the soft magnetic layer 3 is CoP, and the coating thickness is 6 μm. The length is 3cm.

[0046] When the applied magnetic field is 0-60 Oersted and the driving current frequency is 78MHz, the amplitude of impedance effect is 380%, and the sensitivity is 28.7% / Oersted.

Embodiment 2

[0048] In the first step, the metal wire 1 is a beryllium copper wire with a diameter of 110 μm and a length of 8 cm, and the isolation layer 2 is polyester paint with a thickness of 5 μm; in the third step, the soft magnetic layer 3 is CoP, and the coating thickness is 9 μm. The length is 7cm.

[0049] When the applied magnetic field is 0-60 Oersted and the driving current frequency is 47MHz, the amplitude of impedance effect is 951%, and the sensitivity is 88.7% / Oersted.

Embodiment 3

[0051] In the first step, the metal wire 1 is a beryllium copper wire with a diameter of 210 μm and a length of 12 cm, and the isolation layer 2 is polyester paint with a thickness of 5 μm; in the third step, the soft magnetic layer 3 is NiCoP, and the thickness of the coating is 12 μm. The length is 11cm.

[0052]When the applied magnetic field is 0-60 Oersted and the driving current frequency is 29MHz, the amplitude of the impedance effect is 402%, and the sensitivity is 50.2% / Oersted.

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Abstract

A LC resonance giant magneto-resistance effect compound wire and the preparation method thereof, belong to the technical field of magneto-dependent sensor and information function material as well as their preparation. The compound wire consists of a metal wire (1), a separation layer (2), a soft magnetic layer (3), and a terminal (4). The separation layer (2), a dielectric body, is attached on the surface of metal wire (1) in the way that the terminal (4) of the metal wire (1) is exposed to the outside. The soft magnetic layer (3) is attached on the surface of the separation layer (2), and the terminal (4) and the soft magnetic layer (3) are the two lead-out ends of the compound wire. In preparation, the surface of the metal wire (1) except for the terminal (4) is smeared with the separation layer (2), and a soft magnetic layer (3) in a chemical way is provided on the separation layer (2), thus producing the LC resonance giant magneto-resistance effect compound wire. The compound wire has the advantages of simple technique, low cost, high giant magneto-resistance effect, high disturbance resistance, small geometrical size, and convenient and reliable application in appliances.

Description

technical field [0001] The invention relates to an LC resonance giant magneto-impedance effect composite wire and a preparation method thereof, and belongs to the technical field of magnetic sensitive sensors and information functional materials and their preparation. Background technique [0002] The giant magneto-impedance effect (GMI) refers to the characteristic that the magnetic permeability of some soft magnetic materials changes greatly in the external magnetic field, causing its AC impedance to change greatly. Due to its advantages of high sensitivity, small size, fast response and non-contact, GMI materials have attracted attention in the fields of high-sensitivity magnetic sensors, magnetic recording read heads, magnetic encoders, and automotive automatic guidance, and will play a great role. GMI devices are developing towards miniaturization and integration. [0003] Using the principle of LC resonance can improve the performance of the magnetic sensor. BACKGROU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/39G01R33/09H01L43/02
Inventor 袁望治程金科潘海林阮建中赵振杰杨燮龙
Owner EAST CHINA NORMAL UNIV
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