CN202305778U - Sample rod for magnetic transportation test of semi-conductor material - Google Patents
Sample rod for magnetic transportation test of semi-conductor material Download PDFInfo
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- CN202305778U CN202305778U CN2011203184403U CN201120318440U CN202305778U CN 202305778 U CN202305778 U CN 202305778U CN 2011203184403 U CN2011203184403 U CN 2011203184403U CN 201120318440 U CN201120318440 U CN 201120318440U CN 202305778 U CN202305778 U CN 202305778U
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Abstract
The utility model discloses a sample rod for the magnetic transportation test of a semi-conductor material, and the sample rod is used for researching the impact of microwave radiation on the electrical properties and the spinning properties of the material at extremely low temperature. The sample rod comprises a stainless steel tube, a waveguide tube and an interface thereof, a coaxial cable and an interface thereof, a test lead, a socket, a sample frame, a seal sleeve, a bleeding port and the like. A system is mainly characterized in that: the waveguide tube and the coaxial cable are introduced into the sample rod and respectively lead high-frequency microwave and low-frequency microwave into a sample; and a high-strength and low-heat transfer rate carbon fiber composite material pipe is selected as the waveguide tube, so that the sample temperature is stable at extremely low temperature. The system provides a powerful research tool for a magnetic transportation test and spinning resonance research under the microwave radiation in a strong magnetic field at extremely low temperature.
Description
Technical field
The magnetic that this patent relates to a kind of semiconductor material transports the specimen holder of test; Be specifically related to a kind of a kind of specimen holder that semiconductor material magnetic transports test that is used for that is used for; It is a kind of specimen holder of under utmost point low temperature, high-intensity magnetic field and microwave irradiation, semiconductor material electricity transport property being studied, and is used for electronic transport quantum effect and electron spin resonance etc. under the original position research microwave irradiation.
Background technology
In the semiconductor material means of testing relevant with device, it is a kind of important and basic research means that magnetic transports, in order to the carrier concentration of research material, essential informations such as type and mobility.And under the condition of profound hypothermia; Numerous quantum effects show; As the correction that classical electricity is led; The quantum effect that electricity is led reflects the physical messages such as spin properties of material, and these characteristics maybe be at the physical device of a new generation---be applied in the spintronics device, therefore have important researching value.The quantum effect that electricity is led is studied and is become a new subject, and the phenomenon of research comprises magnetic resistance vibration, quantum Hall effect, weak local and anti-weak local effect, quantum tunneling etc.
These researchs are most of adopts traditional profound hypothermia magnetic to transport the specimen bar; Can not realize adding these means of microwave irradiation; And have been found that in recent years microwave irradiation has tangible influence to the sub-effect of conductance; Importance based on this field; This patent transports at traditional magnetic and has designed the specimen holder that can original position carries out microwave irradiation on the basis of specimen bar, in the middle of specimen holder, introduces waveguide and concentric cable, has realized changing continuously of microwave frequency on a large scale; Can realize the material electricity transport property under the original position research microwave irradiation, for magnetic under utmost point low temperature, high-intensity magnetic field and the microwave irradiation transports test and spin resonance research provides powerful tool.
Summary of the invention
The purpose of this patent provides a kind of specimen holder that semiconductor material magnetic under the microwave irradiation transports test that is used for, and solves tradition and transports the problem that test can not obtain the microwave irradiation response of electrology characteristic.
This patent transports at traditional semiconductor material utmost point low temperature, high-intensity magnetic field magnetic and introduces microwave irradiation in the test, thereby original position research microwave irradiation is led the classical electricity of material and the influence of spin-orbit splitting ability, also can carry out the research of electron spin resonance aspect simultaneously.Wherein said microwave irradiation comprise different capacity and different frequency continuously and the pulse microwave signal, said magnetic transports the measurement that test is included under different microwave frequencies, power and magnetic field, the temperature electricity transport properties such as resistivity to material, Hall coefficient, current-voltage curve.
This patent; Technology barriers such as thermal stability and impermeability have been overcome; At inner waveguide and the concentric cable introduced of traditional specimen holder; Can when magnetic transports test, microwave be imported to the sample place, realize the original position research of electricity transport property and spin properties under the microwave irradiation, a kind of effective tool is provided for microwave magnetic transports research.
The technical scheme of this patent is following:
Specimen holder comprises stainless-steel tube 101, interface box 102, coaxial waveguide conversion mouth 103, coaxial cable interface 104, test lead interface 105, interface box bleeding point 106, waveguide 107, concentric cable 108, test lead 109, sealing shroud 110, sealing shroud rubber ring 111, sealing shroud ring flange 112, sealing shroud bleeding point 113, fixed support 114, specimen holder 115 and sample slot 116, and basic structure is seen accompanying drawing 1.
Stainless-steel tube 101 tops and interface box 102 sealing welding; Coaxial waveguide conversion mouth 103, coaxial cable interface 104, test lead interface 105 and interface box bleeding point 106 are installed on interface box 102 sidewalls; Waveguide 107, concentric cable 108 and test lead 109 parallel passing through from stainless-steel tube 101; The sealing shroud 110 that non-magnetic stainless steel is processed is enclosed within on the stainless-steel tube 101 and can be free to slide, and its upper end seals through sealing shroud rubber ring 111 with stainless-steel tube 101, and the lower end is a sealing shroud ring flange 112; Sidewall is equipped with sealing shroud bleeding point 113; Fixed support 114 jam-packs are in the bottom of stainless-steel tube 101, and waveguide 107 is fixed on its top, and the bottom links to each other with specimen holder 115 through screw; Specimen holder 115 is introduced with microwave signal in the hole that concentric cable 108 passes on the fixed support 114, and the hole that test lead 109 passes on the fixed support 114 is connected on the sample slot 116.
Stainless-steel tube 101 adopts non-magnetic stainless steel to process, and main rising supported and sealing function.The internal diameter of stainless-steel tube 101 can allow waveguide 107, concentric cable 108, test lead 109 from stainless-steel tube 101, to pass through; External diameter guarantee stainless-steel tube 101 can insert should try one's best under the situation of required cooled cryostat big, to guarantee the intensity of stainless-steel tube 101.
Coaxial waveguide conversion mouth 103 is installed on interface box 102 sidewalls, and the outer end is outer coaxial cable interface, and the inner is connected with waveguide 107, realizes that microwave signal is connected by the conversion of outer concentric cable to waveguide.Airtight between coaxial/waveguide transitions mouth 103 inside and outside ends.
Interface box bleeding point 106 is installed on interface box 102 sidewalls, bottom and the welding of interface box 102 sidewalls, and the top is a ring flange.Interface box bleeding point 106 is used to connect aspiration pump, to satisfy the needs of the decompression of from specimen holder, bleeding when decompression is lowered the temperature.
Waveguide 107 is fixed on stainless-steel tube 101 inside, and the lower end is fixing by fixed support 114, and support leaves pore, to satisfy the needs of the decompression of from specimen holder, bleeding when decompression is lowered the temperature.For prevent waveguide 107 in utmost point low temperature environment to specimen holder 115 heat conduction; Thereby cause the sample temperature on the specimen holder 115 can't be stabilized in utmost point low temperature; Waveguide 107 adopts the carbon fibre of composite material pipe of low carbon fibre of thermal conductivity and resin compacting to make, and inner wall smooth and copper facing are to increase the microwave transmission ability.Waveguide 107 is mainly used in the carry high frequency microwave.Waveguide 107 upper ends and coaxial waveguide conversion mouthfuls 103 is connected, after the lower end is blocked, and the sample slot 116 of section on the specimen holder 115.
Sealing shroud 110 adopts non-magnetic stainless steel to process, and sealing shroud 110 upper ends and stainless-steel tube 101 are through 111 sealings of sealing shroud rubber ring, and sealing shroud 110 can be free to slide on stainless-steel tube 101.Sealing shroud 110 lower ends are sealing shroud ring flange 112, the cooled cryostat cavity that this ring flange is used to be tightly connected and holds specimen holder.Because sealing shroud 110 can be free to slide on stainless-steel tube 101; Therefore after sealing shroud ring flange 112 is tightly connected with cooled cryostat; Specimen holder can freely be twitched in cooled cryostat; Make the specimen holder 115 of specimen holder lower end can get into the very low temperature region territory of cooled cryostat (if this cooled cryostat comprises superconducting magnet, then this very low temperature region territory also has high-intensity magnetic field).On sealing shroud 110 sidewalls sealing shroud bleeding point 113 is installed, this bleeding point is used to connect aspiration pump, to satisfy the needs of the decompression of from the cooled cryostat cavity that holds specimen holder, bleeding when decompression is lowered the temperature.
As shown in Figure 2, fixed support 114 is processed by teflon, and its top jam-pack is in stainless-steel tube 101 lower surfaces; Waveguide 107 is fixed in the hole in the middle of the support, leaves four symmetrical pores on the bracket edge, makes concentric cable and test lead pass through; Satisfy the needs of the decompression of bleeding simultaneously, pore is grooved, and support the latter half is the parallel double arm configuration; Be positioned at the lower limb symmetric position, each makes a call to a circular hole both arms lower end, is connected with specimen holder 115 through bolt.
Specimen holder 115 usefulness hard PVC plastics are processed, and are the hand basket shape, and sample slot 116 is positioned at the hand basket bottom.Specimen holder 115 is fixed in stainless-steel tube 101 bottoms by fixed support 114, makes sample slot 116 over against the lower end section of waveguide 107 and concentric cable 108, thereby makes that sample is accepted microwave irradiation in the slot.Sample slot 116 materials are the PVC plastics, allow microwave penetrating, and sample slot 116 can be placed in the inboard or the outside of specimen holder 115 hand baskets bottom, makes that microwave irradiation all can be accepted in the sample positive and negative in the slot.
The specimen holder lower member comprises that the decomposition view of fixed support 114, specimen holder 115, sample slot 116 is shown in Fig. 2.
The method of application and the process of this patent are following: shown in accompanying drawing 3; At first sample is assigned on the sample slot 116, sealing shroud 110 is slid into the specimen holder lower end, fixed support 114 should be included in the sealing shroud 110 with specimen holder 115 this moments; Sealing shroud 110 is connected sealing with low-temperature test Dewar flange 117 through sealing shroud ring flange 112 with rubber washer; Exhaust tube is connected sealing with ring flange on the sealing shroud bleeding point 113 through rubber ring, and this moment, the interface box bleeding point should be by baffle plate and seal with elastometic washer, and whole sample bar and Dewar test cabinet 120 are a sealing system; Be in isolation with atmosphere; Utilize mechanical pump to bleed, the air in the specimen holder is extracted out, prevent that air from solidifying and system is freezed under profound hypothermia through sealing shroud bleeding point 114; Because sealing shroud 110 can be free to slide on stainless-steel tube 101 surfaces; Can be inserted into stainless-steel tube 101 and specimen holder main body fixed thereon and in it in the profound hypothermia strong magnetic field circumstance in the Dewar test cabinet 120 this moment; Insertion process is wanted slowly, and this is because internal-external temperature difference is huge, slowly gets into to help protection system and sample; Also can save cryogenic media (liquid helium); When stainless-steel tube 101 all inserts in the Dewar test cabinet 120,102 times end in contact of sealing shroud 110 upper ends and interface box, specimen holder 115, sample slot 116 and sample have got into superconducting magnet 119 centers at this moment.The cryogenic liquid liquid helium is injected the sample place, and this moment, sample was in the low temperature about 4.2K, and exhaust tube is moved to interface box bleeding point 106 decompression of bleeding, and can the temperature in the sample chamber be reduced to about 1.3K.Connect various test ammeters and test lead socket 105 this moment; The microwave generator output terminal is imported in the specimen holder with concentric cable; If the low frequency microwave, then concentric cable is connected to coaxial cable interface 104, and the low frequency microwave passes through concentric cable 108 irradiation to sample; If high-frequency microwave, on concentric cable is connected to coaxial/waveguide converting interface 103, high-frequency microwave through waveguide 107 irradiation to sample.After connecting system, treat that system stability arrives required probe temperature, the magnetic that promptly can carry out under the microwave irradiation transports test.
This patent has following advantage: waveguide and concentric cable are introduced magnetic simultaneously transport the specimen bar; Can the microwave signal in very wide power and the frequency range be imported on the sample that is in utmost point low temperature, the strong magnetic field circumstance, realized the electricity transport property in site measurement under the microwave irradiation.Waveguide body material has adopted carbon fibre composite, greatly reduces temperature conductivity, has realized sample temperature stablizing under utmost point low temperature.
Description of drawings
Fig. 1: specimen holder basic block diagram.Each several part is among the figure: stainless-steel tube 101, interface box 102, coaxial/waveguide transitions mouth 103, coaxial cable interface 104, test lead interface 105, interface box bleeding point 106, waveguide 107, concentric cable 108, test lead 109, sealing shroud 110, sealing shroud rubber ring 111, sealing shroud ring flange 112, sealing shroud bleeding point 113, fixed support 114, specimen holder 115, sample slot 116.
Fig. 2: each exploded of specimen holder end portion.
Fig. 3: specimen holder operation instruction synoptic diagram, each several part is among the figure: stainless-steel tube 101, interface box 102, coaxial/waveguide transitions mouth 103, coaxial cable interface 104, test lead interface 105, interface box bleeding point 106, sealing shroud 110, sealing shroud rubber ring 111, sealing shroud ring flange 112, sealing shroud bleeding point 113, fixed support 114, specimen holder 115, sample slot 116, Dewar seal flange 117, Dewar 118, superconducting magnet 119, Dewar test cabinet 120.
Embodiment
Provide one of this patent instance preferably according to patent content and description of drawings below, further specify patent art details, architectural feature and functional characteristics in conjunction with instance.But this instance does not limit scope, and conforming with the instance of describing in patent content and the description of drawings all should be included in the scope.
All parts of specimen holder all require non magnetic, otherwise under high-intensity magnetic field, can damage and disturb.Stainless-steel tube 101 is selected stainless steel material for use, because waveguide 107, concentric cable 108, test lead 109 will be installed in inside, it is suitably big that internal diameter is wanted, and therefore selects internal diameter 25mm for use, external diameter 28mm, and wall thickness 1.5mm is about the stainless-steel tube of 180cm.
Claims (6)
1. one kind is used for the specimen holder that semiconductor material magnetic transports test; Comprise: stainless-steel tube (101), interface box (102), coaxial waveguide conversion mouthful (103), coaxial cable interface (104), test lead interface (105), interface box bleeding point (106), waveguide (107), concentric cable (108), test lead (109), sealing shroud (110), sealing shroud rubber ring (111), sealing shroud ring flange (112), sealing shroud bleeding point (113), fixed support (114), specimen holder (115) and sample slot (116) is characterized in that:
Described stainless-steel tube (101) top and described interface box (102) sealing welding; Described coaxial waveguide conversion mouthful (103), described coaxial cable interface (104), described test lead interface (105) and described interface box bleeding point (106) are installed on interface box (102) sidewall; Described waveguide (107), described concentric cable (108) and described test lead (109) parallel passing through from stainless-steel tube (101); The sealing shroud that described non-magnetic stainless steel is processed (110) is enclosed within stainless-steel tube (101) and goes up and can be free to slide; Its upper end seals through sealing shroud rubber ring (111) with stainless-steel tube (101); The lower end is sealing shroud ring flange (112), and sidewall is equipped with sealing shroud bleeding point (113), and fixed support (114) jam-pack is in the bottom of stainless-steel tube (101); Waveguide (107) is fixed on its top; The bottom links to each other with specimen holder (115) through bolt, and specimen holder (115) is introduced with microwave signal in the hole that concentric cable (108) passes on the fixed support (114), and the hole that test lead (109) passes on the fixed support (114) is connected on the sample slot (116).
2. a kind of specimen holder that semiconductor material magnetic transports test that is used for according to claim 1; It is characterized in that: described stainless-steel tube (101) adopts non-magnetic stainless steel to process; Its internal diameter should guarantee that waveguide (107), concentric cable (108) and test lead (109) pass through from stainless-steel tube (101), stainless-steel tube when its external diameter should guarantee work (101) can insert in the cooled cryostat.
3. a kind of specimen holder that semiconductor material magnetic transports test that is used for according to claim 1; It is characterized in that: described interface box (102) adopts non-magnetic stainless steel to process; Its top has ring flange and is tightly connected with the top cover screw; Its bottom and the welding of stainless-steel tube (101) top seal, its sidewall opening are used to install coaxial waveguide conversion mouthful (103), coaxial cable interface (104), test lead interface (105) and interface box bleeding point (106).
4. a kind of specimen holder that semiconductor material magnetic transports test that is used for according to claim 1 is characterized in that: described waveguide (107) adopts the carbon fibre of composite material pipe of low carbon fibre of thermal conductivity and resin compacting to make inner wall smooth and copper facing.
5. a kind of specimen holder that semiconductor material magnetic transports test that is used for according to claim 1, it is characterized in that: described fixed support (114) is processed by teflon, and its top jam-pack is in stainless-steel tube (101) lower surface; Waveguide (107) is fixed in the last hole in the middle of the support, leaves four symmetrical pores on the bracket edge, makes concentric cable and test lead pass through; Satisfy the needs of the decompression of bleeding simultaneously; Pore is grooved, and support the latter half is the parallel double arm configuration, is positioned at the lower limb symmetric position; Each makes a call to a circular hole both arms lower end, is connected with specimen holder (115) through bolt.
6. a kind of specimen holder that semiconductor material magnetic transports test that is used for according to claim 1; It is characterized in that: described specimen holder (115) is processed with the hard PVC plastics; Be the hand basket shape; Sample slot (116) is positioned at the hand basket bottom, and the inboard or the outside that sample slot (116) is placed in specimen holder (115) hand basket bottom make sample front or reverse side in the slot receive microwave irradiation.
Priority Applications (1)
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CN2011203184403U CN202305778U (en) | 2011-08-29 | 2011-08-29 | Sample rod for magnetic transportation test of semi-conductor material |
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CN2011203184403U CN202305778U (en) | 2011-08-29 | 2011-08-29 | Sample rod for magnetic transportation test of semi-conductor material |
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CN2011203184403U Withdrawn - After Issue CN202305778U (en) | 2011-08-29 | 2011-08-29 | Sample rod for magnetic transportation test of semi-conductor material |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102313874A (en) * | 2011-08-29 | 2012-01-11 | 中国科学院上海技术物理研究所 | Sample rod used in magnetic transportation test under microwave irradiation |
CN103529407A (en) * | 2013-10-10 | 2014-01-22 | 中国科学院上海技术物理研究所 | Sample rod for contactless type low-temperature magnetic transportation test |
CN107389455A (en) * | 2017-09-05 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | The heat sink and method of sample initial temperature in being compressed for Magnetic driving oblique wave |
WO2019029161A1 (en) * | 2017-08-10 | 2019-02-14 | 中国科学技术大学 | Pulsed electron paramagnetic resonance spectrometer |
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2011
- 2011-08-29 CN CN2011203184403U patent/CN202305778U/en not_active Withdrawn - After Issue
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102313874A (en) * | 2011-08-29 | 2012-01-11 | 中国科学院上海技术物理研究所 | Sample rod used in magnetic transportation test under microwave irradiation |
CN103529407A (en) * | 2013-10-10 | 2014-01-22 | 中国科学院上海技术物理研究所 | Sample rod for contactless type low-temperature magnetic transportation test |
CN103529407B (en) * | 2013-10-10 | 2016-01-13 | 中国科学院上海技术物理研究所 | A kind of non-contact type low temperature magnetic transports the specimen holder of test |
WO2019029161A1 (en) * | 2017-08-10 | 2019-02-14 | 中国科学技术大学 | Pulsed electron paramagnetic resonance spectrometer |
GB2567397A (en) * | 2017-08-10 | 2019-04-10 | Univ Science & Technology China | Pulsed electron paramagnetic resonance spectrometer |
US10802102B2 (en) | 2017-08-10 | 2020-10-13 | University Of Science And Technology Of China | Pulsed electron paramagnetic resonance spectrometer |
GB2567397B (en) * | 2017-08-10 | 2022-06-22 | Univ Science & Technology China | Pulsed electron paramagnetic resonance spectrometer |
CN107389455A (en) * | 2017-09-05 | 2017-11-24 | 中国工程物理研究院流体物理研究所 | The heat sink and method of sample initial temperature in being compressed for Magnetic driving oblique wave |
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Granted publication date: 20120704 Effective date of abandoning: 20130710 |
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Granted publication date: 20120704 Effective date of abandoning: 20130710 |
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