CN108459284A - The ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements - Google Patents
The ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements Download PDFInfo
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- CN108459284A CN108459284A CN201710088740.9A CN201710088740A CN108459284A CN 108459284 A CN108459284 A CN 108459284A CN 201710088740 A CN201710088740 A CN 201710088740A CN 108459284 A CN108459284 A CN 108459284A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/1215—Measuring magnetisation; Particular magnetometers therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/16—Measuring susceptibility
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- General Physics & Mathematics (AREA)
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Abstract
The present invention relates to the ferromagnetic resonance experimental rigs of Microwave Iron Oxide Elements, belong to ferromagnetic resonance experimental technique field；The pedestal is equipped with specimen holder；The centre of the specimen holder is equipped with sample；The top of the specimen holder is equipped with electromagnet；The both sides of the specimen holder are equipped with resonant cavity；One end of the resonant cavity is connected with several wave guide members；Wavelength table, attenuator, isolator are equipped between each two wave guide member successively；The end of described resonant cavity one end is equipped with microwave solid signal source；The microwave solid signal source is connect with microwave power supply；The electromagnet is connect with D.C. magnetic field voltage；The resonant cavity other end is set there are two wave guide member；It is reasonable in design, easy to operate, and flexibility is good, and stability is high, can effectively detect ferromagnetic resonance, has important application value in the manufactures of Microwave Iron Oxide Elements, design etc..
Description
Technical field
The present invention relates to the ferromagnetic resonance experimental rigs of Microwave Iron Oxide Elements, belong to ferromagnetic resonance experimental technique field.
Background technology
Microwave Iron Oxide Elements play isolation, belt, direction transformation, phase control in microwave circuit to microwave signal or energy
The effects that system, amplitude modulation or frequency tuning, it is widely used in radar, communication, radionavigation, electronic countermeasure, remote control, telemetering etc.
In microwave system and microwave measuring instrument.Isolator and circulator are that nineteen fifty-one, root was invented suddenly by C.L..It is then many new
Linear device, such as phase-shifter, switch, modulator occur in succession.Nineteen fifty-seven H. Soviet Union's ear has been invented microwave ferrite parameter and has been put
Big device, has developed nonlinear device, although failing to reach practical, facilitation has been played to the development of other parametric devices.60
At the beginning of age, magnetic tuned filter, magnetic tune oscillator etc. are succeeded in developing, and are answered in electronic countermeasure technology and microwave measuring instrument
With.Later various Microwave Iron Oxide Elements continue to develop, and become a kind of important microwave device.
Ferromagnetic resonance is a kind of self-oscillatory form of electric system, is due to the ferromagnetic electricity such as transformer, voltage transformer
Duration caused by the saturation of sense, amplitude resonance overvoltage phenomenon.
Iron-core inductance is nonlinear in resonant tank, and inductance value increases with electric current, iron core is saturated and tends to be steady；It is ferromagnetic
Resonance needs certain shooting condition, and voltage, current amplitude is made to be transferred to resonant condition from normal operating conditions.Such as supply voltage
It temporarily increases, system is by stronger rush of current etc.；There are self-sustaining phenomenons for ferromagnetic resonance.After excitation condition disappears, iron
Magnetic resonance overvoltage still can continue long-term existence；Ferro-resonance over-voltage generally will not be very high, and Overvoltage Amplitude is main
Degree of saturation depending on iron-core inductance.
Early in nineteen thirty-five, famous Soviet Union physicist Landor (Lev Davydovich Landau 1908-1968) etc. just
It is proposed that there is ferromagnetic material ferromagnetic resonance characteristic just to be observed ferromagnetic after super high frequency technique grows up by the more than ten years
RESONANCE ABSORPTION phenomenon, rear incoming wave ear obtain (Polder) and marquis's root (Hogan) and are furtheing investigate ferromagnetic RESONANCE ABSORPTION and gyromagnet
On the basis of property, ferritic Microwave Linear device has been invented so that ferromagnetic resonance technology enters a new stage.From 20
After the forties in century grows up, as ferromagnetic resonance and nuclear magnetic resonance, electron spin resonance etc., become research substance broad perspectives
Can and to analyze the effective means of its microstructure.
Microwave ferromagnetic resonance phenomenon refers to that ferromagnetic medium is in the microwave electromagnetic field that frequency is f0, additional constant when changing
When the size of magnetic field H, the RESONANCE ABSORPTION phenomenon of generation.It is tested by ferromagnetic resonance, the resonance line of microwave ferrite can be measured
The important parameters such as width, tensor susceptibility, saturation magnetization, curie point.
Invention content
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in structure, reasonable design makes
With the ferromagnetic resonance experimental rig of convenient Microwave Iron Oxide Elements.
To achieve the above object, the technical solution adopted by the present invention is：It includes pedestal, specimen holder, electromagnet, resonance
It is chamber, wave guide member, wavelength table, attenuator, isolator, microwave solid signal source, microwave power supply, D.C. magnetic field voltage, output end, micro-
Pacify table；The pedestal is equipped with specimen holder；The centre of the specimen holder is equipped with sample；The top of the specimen holder is equipped with electromagnetism
Iron；The both sides of the specimen holder are equipped with resonant cavity；One end of the resonant cavity is connected with several wave guide members；Each two waveguide
Wavelength table, attenuator, isolator are equipped between part successively；The end of described resonant cavity one end is equipped with microwave solid signal source；Institute
The microwave solid signal source stated is connect with microwave power supply；The electromagnet is connect with D.C. magnetic field voltage；The resonant cavity is another
One end is set there are two wave guide member；And isolator is equipped between wave guide member；The output end is connect with resonant cavity, and the output end
It is connect with microampere meter.
Preferably, the operating procedure of the ferromagnetic resonance experimental rig is as follows：
A, starting switch opens power supply, power work mode is selected under constant amplitude state, preheats ten minutes；
B, resonant cavity is removed electromagnet, and microampere meter is connected on the output end of crystal detector；
C, by adjust klystron power supply on voltage and frequency adjusting knob make a microampere meter reading maximum so that by humorous
The power output after chamber of shaking is maximum, i.e., is in resonant condition by formula resonant cavity and adjusts variable attenuator and make microampere meter
Pointer is located at 2/3 range of graduation apparatus or so；
D, adjusting wavelength table makes a microampere meter reading reach minimum value, reads the scale value of wavelength table, records microwave frequency；
E, sample is pushed into electromagnet, sample is kept to be in magnetic field center, regulating magnet electric current so that microampere meter reading
At this moment minimum is in resonance state, records magnetic field intensity B at this time；
F, data are recorded, simultaneously analysis result is calculated.
The electromagnet provides external magnetic field, makes iron atom energy level splitting.
The microwave power supply provides energy, makes low-lying level electron transition to high level.
The wave guide member one direction conducts microwaves, make it through sample.
The wavelength table is used to measure the wavelength of microwave.
The resonant cavity, resonant frequency is equal with the frequency of microwave, and the microwave of entrance and its resonance, sample are placed on wave crest
Place, the microwave magnetic field at this are vertical with external magnetic field.
The microwave solid signal source generates the microwave signal of 9GHZ or so.
The isolator makes microwave can only one direction propagation.
The size of the attenuator control microwave energy.
The output end contains microwave detector diode, and output current is directly proportional to the microwave power of input.
The D.C. magnetic field voltage provides exciting current to electromagnet, and the size for changing output voltage is i.e. changeable
Ferromagnetic resonance is actually the electron spin paramagnetic resonance of ferrite atom in the present invention, in identical external magnetic field
Middle electron energy level split separation is about 1840 times of nuclear-magnetism energy splitting, so the energy needed for transition between the energy levels is needed than nuclear magnetic resonance
Big more of the energy wanted, therefore the energy needed for electron transition can be provided with microwave (about 9GHZ), in an experiment microwave
Frequency is fixed, and the energy in resonant cavity at sample is also fixed, to generate the energy between magnetic resonance electron energy level
Difference is necessarily equal to the value, by changing exciting current value, external magnetic field magnetic induction intensity 0B is made to change, thus makes between electron energy level
Energy difference changes correspondingly, and when it is close to microwave energy magnitude, electronics will absorb the energy of microwave magnetic field, generate ferromagnetic total
It shakes, the output current for showing as wave detector reduces, magnetic induction intensity value when the corresponding external magnetic field B of current minimum is resonance.
The electric current direct ratio of detector diode output inputs microwave power with it, changes external magnetic field B and actually changes particle two
Energy difference between energy level, when it is not equal to microwave energy at particle, particle does not absorb microwave energy, and microwave can fully pass over grain
Son reaches diode, so that it is exported a larger electric current and continues to adjust B, when the energy difference between two energy level of particle is equal to particle
When locating microwave energy, particle absorption microwave energy makes output current reduce, when the corresponding external magnetic field of minimum value is magnetic resonance
Field strength values.
With the above structure, the present invention has the beneficial effect that：The ferromagnetic resonance of Microwave Iron Oxide Elements of the present invention
Experimental rig, reasonable in design, easy to operate, flexibility is good, and stability is high, ferromagnetic resonance can be effectively detected, micro-
The manufacture of wave ferrite device, design etc. have important application value.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the present invention；
Reference sign：
Pedestal 1, specimen holder 2, electromagnet 3, resonant cavity 4, wave guide member 5, wavelength table 6, attenuator 7,
Isolator 8, microwave solid signal source 9, microwave power supply 10, D.C. magnetic field voltage 11, output end
12, microampere meter 13.
Specific implementation mode
The present invention will be further described below with reference to the drawings.
Referring to as shown in Figure 1, present embodiment includes pedestal 1, specimen holder 2, electromagnet 3, resonant cavity 4, wave guide member
5, wavelength table 6, attenuator 7, isolator 8, microwave solid signal source 9, microwave power supply 10, D.C. magnetic field voltage 11, output end 12,
Microampere meter 13；The pedestal 1 is equipped with specimen holder 2；The centre of the specimen holder 2 is equipped with sample；The top of the specimen holder 2
Equipped with electromagnet 3；The both sides of the specimen holder 2 are equipped with resonant cavity 4；One end of the resonant cavity 4 is connected with several waveguides
Part 5；Wavelength table 6, attenuator 7, isolator 8 are equipped between each two wave guide member 5 successively；The end of 4 one end of the resonant cavity is set
There is microwave solid signal source 9；The microwave solid signal source 9 is connect with microwave power supply 10；The electromagnet 3 and D.C. magnetic field
Voltage 11 connects；4 other end of resonant cavity is set there are two wave guide member 5；And isolator 8 is equipped between wave guide member 5；It is described defeated
Outlet 12 is connect with resonant cavity 4, and the output end 12 is connect with microampere meter 13.
Wherein, the operating procedure of the ferromagnetic resonance experimental rig is as follows：
A, starting switch opens power supply, power work mode is selected under constant amplitude state, preheats ten minutes；
B, resonant cavity is removed electromagnet, and microampere meter is connected on the output end of crystal detector；
C, by adjust klystron power supply on voltage and frequency adjusting knob make a microampere meter reading maximum so that by humorous
The power output after chamber of shaking is maximum, i.e., is in resonant condition by formula resonant cavity and adjusts variable attenuator and make microampere meter
Pointer is located at 2/3 range of graduation apparatus or so；
D, adjusting wavelength table makes a microampere meter reading reach minimum value, reads the scale value of wavelength table, records microwave frequency；
E, sample is pushed into electromagnet, sample is kept to be in magnetic field center, regulating magnet electric current so that microampere meter reading
At this moment minimum is in resonance state, records magnetic field intensity B at this time；
F, data are recorded, simultaneously analysis result is calculated.
The electromagnet 3 provides external magnetic field, makes iron atom energy level splitting；The microwave power supply 10 provides energy, makes low energy
Grade electron transition is to high level；5 one direction conducts microwaves of the wave guide member, make it through sample；The wavelength table 6 is for measuring
The wavelength of microwave；The resonant cavity 5, resonant frequency is equal with the frequency of microwave, and the microwave of entrance and its resonance, sample are placed on
At wave crest, the microwave magnetic field at this is vertical with external magnetic field；The microwave solid signal source 9 generates the microwave signal of 9GHZ or so；
The isolator 8 makes microwave can only one direction propagation；The attenuator 7 controls the size of microwave energy；The output end 12 contains
There are microwave detector diode, output current directly proportional to the microwave power of input；The D.C. magnetic field voltage 11 gives electromagnet
Exciting current is provided, the size for changing output voltage is i.e. changeable
Ferromagnetic resonance is actually the electron spin paramagnetic resonance of ferrite atom in present embodiment, identical
External magnetic field in electron energy level split separation be about 1840 times of nuclear-magnetism energy splitting, so the energy needed for transition between the energy levels is than core
Big more of energy that magnetic resonance needs, therefore the energy needed for electron transition can be provided with microwave (about 9GHZ), it is testing
The frequency of middle microwave is fixed, and the energy in resonant cavity at sample is also fixed, to generate magnetic resonance electron energy level
Between energy difference be necessarily equal to the value, by changing exciting current value, so that external magnetic field magnetic induction intensity 0B is changed, thus make electronics
Energy difference between energy level changes correspondingly, and when it is close to microwave energy magnitude, electronics will absorb the energy of microwave magnetic field, generates
Ferromagnetic resonance, the output current for showing as wave detector reduce, and magnetic induction when the corresponding external magnetic field B of current minimum is resonance is strong
Angle value.
The electric current direct ratio that detector diode exports in present embodiment inputs microwave power with it, changes external magnetic field B
Actually change the energy difference between two energy level of particle, when it is not equal to microwave energy at particle, particle does not absorb microwave energy,
Microwave can fully pass over particle and reach diode, so that it is exported a larger electric current and continue to adjust B, when between two energy level of particle
Energy difference when being equal to microwave energy at particle, particle absorption microwave energy makes output current reduce, and minimum value is corresponding outer
Field strength values when magnetic field is magnetic resonance.
With the above structure, present embodiment has the beneficial effect that：Microwave iron oxygen described in present embodiment
The ferromagnetic resonance experimental rig of body device, reasonable in design, easy to operate, flexibility is good, and stability is high, can effectively detect
Ferromagnetic resonance, Microwave Iron Oxide Elements manufacture, design etc. have important application value.
The above is merely illustrative of the technical solution of the present invention and unrestricted, and those of ordinary skill in the art are to this hair
The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention,
It is intended to be within the scope of the claims of the invention.
Claims (3)
1. the ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements, it is characterised in that：It includes pedestal (1), specimen holder (2), electricity
Magnet (3), resonant cavity (4), wave guide member (5), wavelength table (6), attenuator (7), isolator (8), microwave solid signal source (9),
Microwave power supply (10), D.C. magnetic field voltage (11), output end (12), microampere meter (13)；The pedestal (1) is equipped with specimen holder
(2)；The centre of the specimen holder (2) is equipped with sample；The top of the specimen holder (2) is equipped with electromagnet (3)；The specimen holder
(2) both sides are equipped with resonant cavity (4)；(4 one end is connected with several wave guide members (5) to the resonant cavity；Each two wave guide member
(5) wavelength table (6), attenuator (7), isolator (8) are equipped between successively；The end of described resonant cavity (4) one end is equipped with solid
Microwave signal source (9)；The microwave solid signal source 9 is connect with microwave power supply (10)；The electromagnet (3) and D.C. magnetic field
Voltage (11) connects；Described resonant cavity (4) other end is set there are two wave guide member (5)；And isolator is equipped between wave guide member (5)
(8)；The output end (12) connect with resonant cavity (4), and the output end (12) is connect with microampere meter (13).
2. the ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements according to claim 1, it is characterised in that：It is described ferromagnetic
The operating procedure of resonance test device is as follows：
(a), starting switch opens power supply, power work mode is selected under constant amplitude state, preheats ten minutes；
(b), resonant cavity is removed electromagnet, and microampere meter is connected on the output end of crystal detector；
(c), by adjust klystron power supply on voltage and frequency adjusting knob make a microampere meter reading maximum so that pass through resonance
Power output after chamber is maximum, i.e., is in resonant condition by formula resonant cavity and adjusts the finger that variable attenuator makes microampere meter
Needle is located at 2/3 range of graduation apparatus or so；
(d), adjusting wavelength table makes a microampere meter reading reach minimum value, reads the scale value of wavelength table, records microwave frequency；
(e), sample is pushed into electromagnet, sample is kept to be in magnetic field center, regulating magnet electric current so that microampere meter reading is most
It is small, it is at this moment in resonance state, records magnetic field intensity B at this time；
(f), data are recorded, simultaneously analysis result is calculated.
3. the ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements according to claim 1, it is characterised in that：Ferromagnetic resonance
The actually electron spin paramagnetic resonance of ferrite atom, electron energy level split separation is about nuclear-magnetism energy in identical external magnetic field
Grade 1840 times of split separation, so the energy that needs than nuclear magnetic resonance of energy needed for transition between the energy levels greatly more, therefore can be with
The energy needed for electron transition is provided with microwave, the frequency of microwave is fixed in an experiment, in resonant cavity at sample
Energy be also fixed, to generate the energy difference between magnetic resonance electron energy level and be necessarily equal to the value, pass through change exciting current
Value makes external magnetic field magnetic induction intensity 0B change, thus the energy difference between electron energy level is made to change correspondingly, when it is close to microwave energy
When magnitude, electronics will absorb the energy of microwave magnetic field, generate ferromagnetic resonance, and the output current for showing as wave detector reduces, electricity
Flow magnetic induction intensity value when the corresponding external magnetic field B of minimum value is resonance.
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| CN201710088740.9A CN108459284A (en) | 2017-02-20 | 2017-02-20 | The ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710088740.9A CN108459284A (en) | 2017-02-20 | 2017-02-20 | The ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements |
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| CN201710088740.9A Withdrawn CN108459284A (en) | 2017-02-20 | 2017-02-20 | The ferromagnetic resonance experimental rig of Microwave Iron Oxide Elements |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581133A (en) * | 2019-01-24 | 2019-04-05 | 黄河科技学院 | Performance testing device based on antiferroelectric materials |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819262A (en) * | 2010-05-27 | 2010-09-01 | 南京大学 | Frequency-conversion ferromagnetic resonance measuring system |
| CN104237813A (en) * | 2013-06-21 | 2014-12-24 | 电子科技大学 | Novel method for testing ferromagnetic resonance line width of microwave ferrite material |
| CN204439814U (en) * | 2014-09-16 | 2015-07-01 | 北京大华无线电仪器厂 | Microwave ferromagnetic resonance experimental system |
-
2017
- 2017-02-20 CN CN201710088740.9A patent/CN108459284A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819262A (en) * | 2010-05-27 | 2010-09-01 | 南京大学 | Frequency-conversion ferromagnetic resonance measuring system |
| CN104237813A (en) * | 2013-06-21 | 2014-12-24 | 电子科技大学 | Novel method for testing ferromagnetic resonance line width of microwave ferrite material |
| CN204439814U (en) * | 2014-09-16 | 2015-07-01 | 北京大华无线电仪器厂 | Microwave ferromagnetic resonance experimental system |
Non-Patent Citations (2)
| Title |
|---|
| 巷中笔: "铁磁共振实验报告", 《百度文库》 * |
| 阮树仁等: "铁磁共振实验的新方法", 《山东教育学院学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109581133A (en) * | 2019-01-24 | 2019-04-05 | 黄河科技学院 | Performance testing device based on antiferroelectric materials |
| CN109581133B (en) * | 2019-01-24 | 2020-10-09 | 黄河科技学院 | Performance testing device based on antiferroelectric material |
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Application publication date: 20180828 |