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Sandwich structure giant magneto-impedance effect composite material and preparation method

A technology of giant magneto-impedance and composite materials, applied in the field of magnetic sensitive components, can solve the problems such as the inability of the giant magneto-impedance value to be significantly improved and the magnetic flux path to be unable to be well closed, to enhance the GMI effect, suitable for mass production, The effect of increasing sensitivity

Active Publication Date: 2021-02-09
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of stray fields and flux leakage, the magnetic flux path cannot be well closed, and the giant magnetic impedance value cannot be significantly improved.

Method used

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  • Sandwich structure giant magneto-impedance effect composite material and preparation method
  • Sandwich structure giant magneto-impedance effect composite material and preparation method
  • Sandwich structure giant magneto-impedance effect composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Take iron-based amorphous Fe 73.5 Cu 1 Nb 3 Si 13 B 9.5 one strip;

[0030] Step 2: Place the iron-based amorphous strip in step 1 in a tube furnace, set the vacuum degree to 1.5 Pa, raise the temperature to 540° C., inject 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline strip;

[0031] Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M NaOH 2 CO 3 and 0.7M Na 3 PO 4 12H 2 Carry out degreasing and cleaning treatment in the mixed solution of O, and processing time is 10 minutes;

[0032] Step 4: Place the strips obtained in Step 3 in 5M HCl solution for acidification, and the treatment time is 20 minutes;

[0033] Step 5: Place the strips obtained in step 4 in 0.3M SnCl 2 · 2H 2 Sensitization treatment was carried out in the mixed solution of HCl of O and 0.6M, and the treatment time was 20 minutes;

[0034] Step 6: Place the strip obtained in step 5 on a 2.5×10 -4 M PdCl...

Embodiment 2

[0043] Step 1: Take iron-based amorphous Fe 73.5 Cu 1 Nb 3 Si 13 B 9.5 one strip;

[0044] Step 2: Place the iron-based amorphous strip in step 1 in a tube furnace, set the vacuum degree to 1.9 Pa, raise the temperature to 540° C., inject 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline strip;

[0045] Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M NaOH 2 CO 3 and 0.7M Na 3 PO 4 12H 2 Carry out the degreasing cleaning process in the mixed solution of O, and the processing time is 20 minutes;

[0046] Step 4: Place the strips obtained in Step 3 in 5M HCl solution for acidification, and the treatment time is 20 minutes;

[0047] Step 5: Place the strips obtained in step 4 in 0.3M SnCl 2 · 2H 2 Sensitization treatment was carried out in the mixed solution of HCl of O and 0.6M, and the treatment time was 20 minutes;

[0048] Step 6: Place the strip obtained in step 5 on a 2.5×10 -4 M Pd...

Embodiment 3

[0057] Step 1: Take iron-based amorphous Fe 73.5 Cu 1 Nb 3 Si 13 B 9.5 one strip;

[0058] Step 2: Place the iron-based amorphous strip in step 1 in a tube furnace, set the vacuum degree to 2pa, raise the temperature to 540°C, inject 5 sccm of hydrogen, and anneal for 20 minutes to obtain the iron-based nanocrystalline strip;

[0059] Step 3: Place the iron-based nanocrystalline strips obtained in step 2 in 0.4M NaOH, 0.5 M NaOH 2 CO 3 and 0.7M Na 3 PO 4 12H 2 Carry out degreasing and cleaning treatment in the mixed solution of O, and processing time is 10 minutes;

[0060] Step 4: Place the strips obtained in Step 3 in 5M HCl solution for acidification, and the treatment time is 20 minutes;

[0061] Step 5: Place the strips obtained in step 4 in 0.3M SnCl 2 · 2H 2 Sensitization treatment was carried out in the mixed solution of HCl of O and 0.6M, and the treatment time was 10 minutes;

[0062] Step 6: Place the strip obtained in step 5 on a 2.5×10 -4 M PdCl 2 a...

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Abstract

The invention discloses a sandwich structure giant magneto-impedance effect composite material and a preparation method. According to the preparation method, a reduced graphene oxide (rGO) inner layeris synthesized on a nanocrystalline Fe73.5. 5Cu1Nb3Si13B9.5 strip of a sensitive element of a giant magneto-impedance sensor through one-step chemical plating, a FeCo outer layer is obtained througha magnetron sputtering method, and the giant magneto-impedance (GMI) effect composite of the FeCo / rGO / FINEMET / rGO / FeCo sandwich structure is obtained. The invention has the beneficial effects that onone hand, the reduced graphene oxide layer is used as a high-conductivity layer, a channel beneficial to high-frequency current flowing is provided, and the skin effect is greatly reduced; on the other hand, the FeCo layer increases the magnetic conductivity, and a closed magnetic circuit is provided. Finally, the giant magneto-impedance (GMI) effect composite material with the FeCo / rGO / FINEMET / rGO / FeCo sandwich structure obtains a remarkably enhanced GMI effect, the sensitivity of the GMI sensor is also improved, the process is simple, and the giant magneto-impedance composite material is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of magnetic sensitive elements, and relates to synthesizing an inner layer of reduced graphene oxide (rGO) by one-step chemical plating in a sensitive element of a giant magneto-impedance sensor, obtaining an outer layer of FeCo by a magnetron sputtering method, and preparing a giant magneto-impedance (GMI) FeCo / rGO / FINEMET / rGO / FeCo sandwich structure giant magnetoimpedance effect composite material with improved effect. Background technique [0002] The giant magneto-impedance (GMI) effect refers to the effect that the AC impedance of magnetic materials changes significantly with the change of the applied DC magnetic field. Compared with the traditional Hall sensor, the giant magnetoresistance sensor, the giant magnetoresistance effect, as a new magnetic sensing technology, has higher signal output strength and higher weak magnetic field sensitivity; and superconducting quantum interferometer, Compared with fluxgate...

Claims

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Application Information

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IPC IPC(8): H01L43/12H01L43/08H01L43/10
CPCH10N50/10H10N50/85H10N50/01
Inventor 宋也男陈依君赵振杰孙卓邹锦堂
Owner EAST CHINA NORMAL UNIVERSITY
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