CN103107282A - Method for improving giant magneto-impedance effect of materials - Google Patents
Method for improving giant magneto-impedance effect of materials Download PDFInfo
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- CN103107282A CN103107282A CN2013100453350A CN201310045335A CN103107282A CN 103107282 A CN103107282 A CN 103107282A CN 2013100453350 A CN2013100453350 A CN 2013100453350A CN 201310045335 A CN201310045335 A CN 201310045335A CN 103107282 A CN103107282 A CN 103107282A
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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
The present invention relates to a kind of method that improves the giant magnetoresistance effect of material, the present invention relates to exactly to improve the method for giant magnetoresistance effect that its surface attachment has the metal wire combined material of soft magnetic film.
Background technology
In recent years, giant magnetoresistance effect has caused widely to be paid close attention to, and this effect can be used for novel magnetic field sensor.Specifically, giant magnetoresistance effect is when material being applied alternating current, can finding that externally-applied magnetic field can cause the great variety of the electrical impedance of material.Magnetosensitive requirement on devices material has good impedance rate of change and high magnetic field sensitivity, so a lot of researchs concentrate on the giant magnetoresistance effect that improves material now.At present, in actual the use, the material with GMI effect commonly used is mainly amorphous ribbon, the amorphous wire by the technique preparation of hot-quenching chilling, perhaps adopt the soft magnetic film of sputtering method preparation, for soft magnetic film, common structure has individual layer soft magnetic film structure, soft magnetic film/conductive layer/soft magnetic film structure, soft magnetic film/insulating barrier/conductive layer/insulating barrier/soft magnetic film structure, for these three kinds of structures, tape insulation layer structure has stronger giant magnetic impedance rate of change relatively, but the a-c cycle that needs is higher.The development of composite wire structure has overcome this defective, composite wire be a kind of with chemical plating or electric plating method at wire (being generally copper wire) surface deposition one deck magnetosphere, this structure is similar to multi-layer film structure, can directly weld, general composite wire has common advantage with respect to other giant magnetoimpedance materials, preparation is simple, be convenient to integratedly, have to have advantages of that it is unique, have lower frequency and higher impedance rate of change.The low frequency characteristic of composite wire and impedance rate of change thereof remain further to be improved.
A lot of bibliographical informations about in the method for the giant magnetic impedance rate of change that improves material, for example, annealing and ion irradiation, H. Song and D.G.. Park have delivered on Thin Solid Films 519 (2011) 8274 – 8276
The method with ion irradiation of mentioning in " Structural and magnetic studies on the enhancement of the giant magnetoimpedance by ion irradiation " article improves Co base amorphous ribbon giant magnetic impedance rate of change, this literary composition is thought and the collision of macro-energy energy level of a particle of a quantize connection has been produced the transverse anisotropy.J.S. (the J.S. Liu such as Liu, F.Y. Cao, D.W. Xing, L.Y. Zhang, F.X. Qin, H.X. Peng, X. Xue, J.F. Sun) delivered on Journal of Alloys and Compounds 541 (2012) 215 – 221 and mentioned the giant magnetic impedance rate of change that can improve Co base amorphous wire with the method for annealing in " Enhancing GMI properties of melt-extracted Co-based amorphous wires by twin-zone Joule annealing " article, annealing can change the crystallinity of material internal, the electric current horizontal anisotropy of can also inducting.Above said two kinds of methods can well improve the giant magnetic impedance rate of change of material, but implement more difficult, even need more expensive experimental facilities.
Summary of the invention
The method that the purpose of this invention is to provide the giant magnetoresistance effect of the composite material that a kind of conducting metal that improves its surface attachment and have soft magnetic film consists of.
The method of raising material giant magnetoresistance effect of the present invention, particularly its surface attachment have the wire material of soft magnetic film, are to apply tension stress on wire.
Method of the present invention is very simple, but can significantly improve the huge impedance operator of thread composite material, and along with the increase of the tension stress that applies, the low frequency characteristic of composite construction is more obvious, and the change rate of giant magnetic impedance rate is larger.Experiment shows, only has degree of being subjected to material is applied seldom tension stress, can resistive change, and particularly after tension stress load removal, the giant magnetic impedance rate that material still can keep producing because of tension stress changes effect.Test result shows: the impedance rate of change that does not apply pulling force is generally 10-30, and when pulling force is 146.5Mpa, impedance rate of change has reached 13000, and this result is maximum in all researchs at present.Along with the increase of pulling force, impedance rate of change is to be first to increase the trend that reduces afterwards.This method not only can improve the giant magnetoresistance effect of material, uses on magnetic field sensor, can also use on strain gauge.
Embodiment
The present invention illustrates below in conjunction with embodiment.
In following examples, tested material is the copper-nickel alloy silk that contains the metallic nickel composition, then plates one deck soft magnetic film with electric plating method form composite material on wire, after clean is completed, composite wire two ends is applied the mechanical stresses of different sizes.
The material of composite wire is to deposit the FeNi magnetosphere at the copper-nickel alloy silk by electric plating method, sedimentation time 100 s-2000 s, and the composition of the composite material of formation is Fe
100-xNi
x, wherein the value of x is 80-100, is 10 nanometers-10 micron according to the magnetospheric thickness of FeNi as a result of ESEM.Deposit and apply again pulling force after forming composite construction.
The concrete practice is as follows:
(1) wire is plated pre-treatment, the copper-nickel alloy silk is put in the oil removing of NaOH weak solution, is placed on alcohol ultrasonic cleaning 10 min after cleaning.
(2) method with electro-deposition prepares FeNi, sedimentation potential-1.2 V, sedimentation time 800 s
Ferrous sulfate FeSO
47H
2The concentration of O is 0.01 – 0.05 M/L
NiSO
47H
2The concentration of O is 0.1-0.2 M/L
The concentration of boric acid is 0.3 M/L
The concentration of asccharin is 2 g/L
The concentration of glycine is 1 g/L
The concentration of bad blood oxygen acid is 5 g/L
Ni in electroplating solution
+ 2And Fe
+ 2Respectively 0.01-0.05 M/L and 0.1-0.2 M/L, sedimentation time 800 s.Be attached with Fe if obtain its inner copper-nickel alloy outside for conduction
100-xNi
xThe composite material of soft magnetic film.
(3) composite wire that deposits is applied pulling force by tensiometer, fixedly composite wire one end, apply mechanical pulling force to the other end.Experiment shows that the giant magnetic impedance of material changes a lot after aforesaid composite material is applied tension stress.Below be relevant embodiment.
Comparative Examples
With FeSO
47H
2O, NiSO
47H
2O, boric acid, asccharin, glycine, the acid of Vitamin C oxygen is dissolved in 40
oC-60
oThe deionized water for stirring of C is even, and concentration is respectively FeSO
47H
2Concentration 0.01 M/L of O, NiSO
47H
2The concentration of O is 0.01 M/L, and the concentration of boric acid is 0.3 M/L, and the concentration of asccharin is 2 g/L, and the concentration of glycine is 1 g/L, and the concentration of bad blood oxygen acid is 5 g/L.During plating, adopt three-electrode system, anode is platinum electrode, and negative electrode is that external diameter is the copper-nickel alloy silk of 155 microns, and electroplating time is 800s.Thereby obtain Ni
80Fe
20/ copper-nickel alloy filament composite structure, wherein magnetospheric thickness is 5 microns.When not applying pulling force, D.C. magnetic field is 80 oersteds, and when a-c cycle was 10KHz, the giant magnetic impedance rate of change of the composite material that records was 35%.
Embodiment 1
With FeSO
47H
2O, NiSO
47H
2O, boric acid, asccharin, glycine, the acid of Vitamin C oxygen is dissolved in 40
oC-60
oThe deionized water for stirring of C is even, and concentration is respectively FeSO
47H
2Concentration 0.01 M/L of O, NiSO
47H
2The concentration of O is 0.01 M/L, and the concentration of boric acid is 0.3 M/L, and the concentration of asccharin is 2 g/L, and the concentration of glycine is 1 g/L, and the concentration of bad blood oxygen acid is 5 g/L.During plating, adopt three-electrode system, anode is platinum electrode, and negative electrode is that external diameter is the copper-nickel alloy silk of 155 microns, and electroplating time is 800s.Thereby obtain Ni
80Fe
20/ copper-nickel alloy filament composite structure, wherein magnetospheric thickness is 5 microns.The composite wire that makes is applied pulling force, and the stressed 10-80 of unit are is MPa, removal tension stress load, carrying out the giant magnetic impedance rate of change measures, be 80 oersteds at D.C. magnetic field, when a-c cycle was 30KHz, the giant magnetic impedance rate of change of the composite material that records was 100-1000%.
Embodiment 2
With FeSO
47H
2O, NiSO
47H
2O, boric acid, asccharin, glycine, the acid of Vitamin C oxygen is dissolved in 40
oC-60
oThe deionized water for stirring of C is even, and concentration is respectively FeSO
47H
2Concentration 0.01 M/L of O, NiSO
47H
2The concentration of O is 0.01 M/L, and the concentration of boric acid is 0.3 M/L, and the concentration of asccharin is 2 g/L, and the concentration of glycine is 1 g/L, and the concentration of bad blood oxygen acid is 5 g/L.During plating, adopt three-electrode system, anode is platinum electrode, and negative electrode is that external diameter is the copper-nickel alloy silk of 155 microns, and electroplating time is 800s.Thereby obtain Ni
80Fe
20/ copper-nickel alloy filament composite structure, wherein magnetospheric thickness is 5 microns.The composite wire that makes is applied pulling force 100-130 MPa, and removal tension stress load is carried out the giant magnetic impedance rate of change and is measured, and D.C. magnetic field is 80 oersteds, and when a-c cycle was 10KHz, the giant magnetic impedance rate of change of the composite material that records was 5000-9700%.
Embodiment 3
With FeSO
47H
2O, NiSO
47H
2O, boric acid, asccharin, glycine, the acid of Vitamin C oxygen is dissolved in 40
oC-60
oThe deionized water for stirring of C is even, and concentration is respectively FeSO
47H
2Concentration 0.01 M/L of O, NiSO
47H
2The concentration of O is 0.01 M/L, and the concentration of boric acid is 0.3 M/L, and the concentration of asccharin is 2 g/L, and the concentration of glycine is 1 g/L, and the concentration of bad blood oxygen acid is 5 g/L.During plating, adopt three-electrode system, anode is platinum electrode, and negative electrode is that external diameter is the copper-nickel alloy silk of 155 microns, and electroplating time is 800s.Thereby obtain Ni
80Fe
20/ copper-nickel alloy filament composite structure, wherein magnetospheric thickness is 5 microns.The composite wire that makes is applied pulling force 140-170 MPa, removal tension stress load is carried out the giant magnetic impedance rate of change and is measured, and is 80 oersteds at D.C. magnetic field, when a-c cycle was 4KHz, the giant magnetic impedance of the composite material that records was that rate of change is 10000-13000%.
Claims (2)
1. one kind is improved the method for giant magnetoresistance effect that its surface attachment has the wire material of soft magnetic film, it is characterized in that applying tension stress on material.
2. the method for raising material giant magnetoresistance effect claimed in claim 1, is characterized in that described material has Fe for its surface attachment
100-xNi
xSoft magnetic film, it is inner for containing the copper-nickel alloy silk of metallic nickel composition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092738A (en) * | 2016-08-23 | 2016-11-09 | 浙江师范大学 | A kind of fixture for obtaining AGMI effect and the method realizing obtaining AGMI effect based on this fixture |
| CN109238878A (en) * | 2018-09-10 | 2019-01-18 | 宁夏大学 | A method of improving metallic fiber magnetic field sensitivity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170355A (en) * | 1996-12-06 | 1998-06-26 | Kagaku Gijutsu Shinko Jigyodan | High-sensitivity stress detecting apparatus |
| US20020135364A1 (en) * | 2001-02-15 | 2002-09-26 | Petru Ciureanu | Magnetic field sensor with enhanced sensitivity, internal biasing and magnetic memory |
| CN1444296A (en) * | 2003-04-15 | 2003-09-24 | 山东大学 | Giant magneto-impedance effect composite wire and its preparation method |
| CN101105944A (en) * | 2007-06-01 | 2008-01-16 | 华东师范大学 | LC resonant giant magneto-impedance effect composite wire and its preparing process |
-
2013
- 2013-02-05 CN CN201310045335.0A patent/CN103107282B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170355A (en) * | 1996-12-06 | 1998-06-26 | Kagaku Gijutsu Shinko Jigyodan | High-sensitivity stress detecting apparatus |
| US20020135364A1 (en) * | 2001-02-15 | 2002-09-26 | Petru Ciureanu | Magnetic field sensor with enhanced sensitivity, internal biasing and magnetic memory |
| CN1444296A (en) * | 2003-04-15 | 2003-09-24 | 山东大学 | Giant magneto-impedance effect composite wire and its preparation method |
| CN101105944A (en) * | 2007-06-01 | 2008-01-16 | 华东师范大学 | LC resonant giant magneto-impedance effect composite wire and its preparing process |
Non-Patent Citations (2)
| Title |
|---|
| F.X.QIN,H.X.PENG，V.V.POPOV,M.H.PHAN: "Giant magneto-impedance and stress-impedance effects of microwire composites for sensing applications", 《SOLID STATE COMMUNICATIONS》, 31 December 2011 (2011-12-31), pages 293 - 296 * |
| 杨晋丽: "直流电镀NiFe薄膜和Cu/NiFe丝的结构与性能", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, 31 December 2011 (2011-12-31), pages 51 - 66 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092738A (en) * | 2016-08-23 | 2016-11-09 | 浙江师范大学 | A kind of fixture for obtaining AGMI effect and the method realizing obtaining AGMI effect based on this fixture |
| CN106092738B (en) * | 2016-08-23 | 2019-03-15 | 浙江师范大学 | A method of AGMI effect is obtained for obtaining the fixture of AGMI effect and realizing based on the fixture |
| CN109238878A (en) * | 2018-09-10 | 2019-01-18 | 宁夏大学 | A method of improving metallic fiber magnetic field sensitivity |
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| CN103107282B (en) | 2016-06-01 |
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