Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method to improve the giant magneto-impedance effect of materials

A giant magneto-impedance and effect technology, applied in the field of improving the giant magneto-impedance effect of materials, can solve problems such as expensive and difficult implementation

Inactive Publication Date: 2016-06-01
LANZHOU UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two methods mentioned above can improve the giant magnetoresistance change rate of the material very well, but it is difficult to implement and even requires expensive experimental equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] FeSO 4 ·7H 2 O,NiSO 4 ·7H 2 O, boric acid, saccharin, glycine, ascorbic acid soluble in 40 o C-60 o Stir well in deionized water of C, the concentrations are FeSO 4 ·7H 2 O concentration 0.01M / L, NiSO 4 ·7H 2 The concentration of O is 0.01M / L, the concentration of boric acid is 0.3M / L, the concentration of saccharin is 2g / L, the concentration of glycine is 1g / L, and the concentration of ascorbic acid is 5g / L. During electroplating, a three-electrode system is adopted, the anode is a platinum electrode, the cathode is a white copper wire with an outer diameter of 155 microns, and the electroplating time is 800s. so as to get Ni 80 Fe 20 / white copper wire composite structure, in which the thickness of the magnetic layer is 5 microns. Apply tensile force to the prepared composite structure wire, the force per unit area is 10-80 MPa, remove the tensile stress load, and measure the rate of change of giant magnetic impedance. When the DC magnetic field is 80 Oers...

Embodiment 2

[0027] FeSO 4 ·7H 2 O,NiSO 4 ·7H 2 O, boric acid, saccharin, glycine, ascorbic acid soluble in 40 o C-60 o Stir well in deionized water of C, the concentrations are FeSO 4 ·7H 2 O concentration 0.01M / L, NiSO 4 ·7H 2 The concentration of O is 0.01M / L, the concentration of boric acid is 0.3M / L, the concentration of saccharin is 2g / L, the concentration of glycine is 1g / L, and the concentration of ascorbic acid is 5g / L. During electroplating, a three-electrode system is adopted, the anode is a platinum electrode, the cathode is a white copper wire with an outer diameter of 155 microns, and the electroplating time is 800s. so as to get Ni 80 Fe 20 / white copper wire composite structure, in which the thickness of the magnetic layer is 5 microns. Apply a tensile force of 100-130MPa to the prepared composite structural wire, remove the tensile stress load, and measure the rate of change of giant magnetic impedance. When the DC magnetic field is 80 Oersted and the AC freque...

Embodiment 3

[0029] FeSO 4 ·7H 2 O,NiSO 4 ·7H 2 O, boric acid, saccharin, glycine, ascorbic acid soluble in 40 o C-60 o Stir well in deionized water of C, the concentrations are FeSO4 ·7H 2 O concentration 0.01M / L, NiSO 4 ·7H 2 The concentration of O is 0.01M / L, the concentration of boric acid is 0.3M / L, the concentration of saccharin is 2g / L, the concentration of glycine is 1g / L, and the concentration of ascorbic acid is 5g / L. During electroplating, a three-electrode system is adopted, the anode is a platinum electrode, the cathode is a white copper wire with an outer diameter of 155 microns, and the electroplating time is 800s. so as to get Ni 80 Fe 20 / white copper wire composite structure, in which the thickness of the magnetic layer is 5 microns. Apply a tensile force of 140-170 MPa to the prepared composite structural wire, remove the tensile stress load, and measure the rate of change of giant magnetic impedance. When the DC magnetic field is 80 Oersted and the AC frequen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for improving giant magneto-impedance effect of composite materials, wherein the composite materials are formed by electric conduction metal, and the surface of the electric conduction metal is adhered with a soft magnetism thin film. According to the method, pulling stress is exerted on metal wires. Though the method is simple, giant impedance characteristics of silk-shaped composite materials can be improved notably. Low frequency characteristics of a composite structure are more notable with the increase of the exerted pulling stress, and change rate of giant magneto-impedance rate is larger. According to test results, impedance can be changed when small pulling stress is exerted to receiving materials. When loading of the pulling stress is dismounted, the materials can still keep the giant magneto-impedance rate changing effect generated through the pulling stress.

Description

technical field [0001] The invention relates to a method for improving the giant magneto-impedance effect of a material, specifically, the invention relates to a method for improving the giant magneto-impedance effect of a metal wire composite material with a soft magnetic film attached to its surface. Background technique [0002] In recent years, the giant magnetoimpedance effect has attracted extensive attention, and this effect can be used in novel magnetic field sensors. Specifically, the giant magnetoimpedance effect is that when an alternating current is applied to the material, it can be found that the external magnetic field can cause a huge change in the electrical impedance of the material. Magneto-sensitive devices require materials with good resistance change rate and high magnetic field sensitivity, so many researches are now focused on improving the giant magneto-impedance effect of materials. At present, the commonly used materials with GMI effect in actual ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L43/12H01L43/10
Inventor 王建波罗彩勤张毅刘青芳
Owner LANZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com