CN203535204U - Sample rod for contactless low-temperature magneto-transport tests - Google Patents
Sample rod for contactless low-temperature magneto-transport tests Download PDFInfo
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- CN203535204U CN203535204U CN201320623628.8U CN201320623628U CN203535204U CN 203535204 U CN203535204 U CN 203535204U CN 201320623628 U CN201320623628 U CN 201320623628U CN 203535204 U CN203535204 U CN 203535204U
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- waveguide
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Abstract
The utility model discloses a sample rod for contactless low-temperature magneto-transport tests. The sample rod is used for microwave measurement of electrical properties of solid materials in cryogenic strong magnetic fields. The sample rod comprises a top box, a waveguide, lead wire pipes, a coaxial cable and an adaptor, test lead wires and a socket, support disk pieces, a bottom fixing support, a resonant cavity and so on. The sample rod is characterized in that the waveguide and the coaxial cable are introduced into the sample rod at the same time; the waveguide guides microwaves into the resonant cavity in which a sample can be disposed; and the coaxial cable receives the reflected microwaves to achieve microwave measurement of electrical properties of solid materials. Titanium metal materials with high strength and low thermal conductivity are picked for the waveguide and the lead wire pipes, so that the temperature of the sample is kept stable in a cryogenic environment. The system provides a powerful research tool for microwave measurement of electrical properties of solid materials in cryogenic strong magnetic fields.
Description
Technical field
This patent relates to a kind of specimen holder for microwave sounding solid material electrical properties, be specifically related to a kind of specimen holder for non-contact type microwave measurement under profound hypothermia high-intensity magnetic field, for electronic transport quantum effect and electron spin resonance etc. under original position research microwave irradiation.
Background technology
Solid material property research is under extreme conditions the important content in Condensed Matter Physics scientific domain.Under utmost point low temperature and high-intensity magnetic field condition, the quantum effect in solid material becomes significantly.Such as, under profound hypothermia, exist the quantum correction to the classical conductivity of solid material, show as weak local effect and weak anti-local effect, magnetoresistance oscillations and quantum Hall effect etc., it relates to the basic quantum physics effects such as electron spin characteristic and spin(-)orbit coupling.The Quantum Properties relevant to electron spin in solid material can be micro-nano electron device of new generation--spintronics device provides device preparation and the principle basis of controlling, and therefore has important researching value.
Traditional low temperature magnetic transports the electronic transport measuring method that test specimen holder is taked contact, by adding that to sample voltage (or electric current) measures required electric current (or voltage) again, this just must do top electrode on sample, is therefore a kind of method that has loss measurement.And tradition is introduced the low temperature magnetic of microwave irradiation and is transported specimen holder and just introduce microwave irradiation when electronic transport is measured, what utilize is the heating mudulation effect of microwave, be still that what to have the measurement of contact and measurement is the indirect response of microwave, responding microwave is converted into the physical quantity irrelevant with microwave itself.For some solid material, due to the physical property of himself or the factor of sample size, the making of its electrode is very difficult.And according to the interaction of microwave and solid material, by sample being carried out to microwave irradiation and the direct response of microwave being measured, can realize non-contact type nondestructive measurement to solid material.Superiority based on microwave measurement, this patent has designed a kind of specimen holder for microwave measurement under profound hypothermia high-intensity magnetic field, in specimen holder, introduce waveguide and concentric cable, realized changing continuously of microwave frequency on a large scale, can realize the original position microwave measurement to solid material electrical properties, for magnetic under utmost point low temperature, high-intensity magnetic field and microwave irradiation, transport the researchs such as test and electron spin resonance strong research tool is provided.
Summary of the invention
The object of this patent is to provide the specimen holder that a kind of non-contact type low temperature magnetic transports test, and solution traditional electrical transports sample electrode in test and makes difficult problem.
This patent magnetic under traditional solid material utmost point low temperature, high-intensity magnetic field is introduced the method for microwave measurement in transporting test, thus solid material magnetotransport under original position research microwave irradiation, as the responding microwave of the correction of conductance and spin correlation characteristic etc.Wherein said microwave irradiation comprises the continuous and impulse type microwave signal of different capacity and different frequency, and said microwave test is included in the non-contact type microwave measurement to magnetotransports such as the resistivity of material, Hall coefficients at different microwave frequencies, power and magnetic field, temperature.
This patent, at inner waveguide and the concentric cable introduced of specimen holder, can import to microwave at sample place, realized the original position research of electronic transport characteristic and spin properties under microwave irradiation, for the microwave measurement of solid material magnetotransport provides a kind of effective tool.
The technical scheme of this patent is as follows:
Its general structure is as follows: crown box 201 and protective cover 203 and 219 welding of 218,4 fairleads of waveguide; waveguide 218 and 4 fairleads 219 are fixed together by 5 plate rack discs 220, bottom fixing frame 221; resonator cavity 222 is connected with bottom fixing frame 221 by screw; waveguide 218 is fixed on the center hole of 5 plate rack discs 220 and bottom fixing frame 221, and 4 fairleads 219 are fixed on the edge symmetry circular hole of 5 plate rack discs 220 and bottom fixing frame 221; Matching of crown lid 202 diameters and crown box 201, with fixed hinge 204 and _ fixed hinge 205 seals with crown box 201 by sealing O shape circle 216; Concentric cable 213, test lead A214 and test lead B215, its one end respectively enters specimen holder bottom sample place by any one in 4 fairleads 219, and its other end is connected with concentric cable adapter 209, p-wire adapter A210, p-wire adapter B211 respectively; Sealing O shape circle 216 will seal between crown box 201 and crown lid 202, and sealing shroud ring flange 217 seals protective cover 203 and the top interface of cooled cryostat 301.
Fixed hinge 204 adopts non-magnetic stainless steel to make, and can be connected with the horizontal support thick stick of crown box 201 1 sides by long screw.Itself there is the long screw of a butterfly handle, for fixing fixed hinge 204, so that crown lid 202 seals with crown box 201.
Fixed hinge 205 adopts non-magnetic stainless steel to make, and it is welded on the surface of crown lid 202, can be connected with the horizontal support thick stick of crown box 201 1 sides by long screw.Itself there is the long screw of a butterfly handle, for fixing fixed hinge 205, so that crown lid 202 seals with crown box 201.
Coaxial waveguide conversion head 208 is installed on crown box 201 sidewalls, and outer end is outer coaxial cable interface, and the inner is connected with coaxial waveguide connecting line 212, thereby realize microwave signal, by outer concentric cable, the conversion to waveguide connects.Airtight between the inside and outside end of coaxial waveguide conversion head 208.
P-wire adapter A210 is installed on crown box 201 sidewalls, and outer end is A type shielded cable interface, and the inner is connected with test lead A214.Airtight between the inside and outside end of p-wire adapter A210.
P-wire adapter B211 is installed on crown box 201 sidewalls, and outer end is Type B shielded cable interface, and the inner is connected with test lead B215.Airtight between the inside and outside end of p-wire adapter B211.
Coaxial waveguide connecting line 212 is positioned at crown box 201 inside, for connecting the inner and the frequency multiplier 206 of coaxial waveguide conversion head 208.
Test lead A214 is positioned at the inside of specimen holder 200, is 19 core metal wires, connects electrode and the outside detection circuit of sample during for contact type measurement.Its one end is connected in p-wire adapter A210, and the other end is by any bottom that extend into specimen holder 200 in 4 fairleads 219.
Test lead B215 is positioned at the inside of specimen holder 200, is 21 core metal wires, connects electrode and the outside detection circuit of sample during for contact type measurement.Its one end is connected in p-wire adapter B211, and the other end is by any bottom that extend into specimen holder 200 in 4 fairleads 219.
Waveguide 218 is for importing to microwave the bottom of specimen holder 200.Its top is welded in the bottom surface of crown box 201.Its bottom extend into the bottom of specimen holder 200, and faces resonator cavity 222, but does not contact with resonator cavity 222.Waveguide 218 is fixed together by 5 plate rack discs 220 and 4 fairleads 219, and its bottom is inserted in the center hole of bottom fixing frame 221.Waveguide 218 adopts the titanium pipe that thermal conductivity is low to make, to prevent that it from causing the sample temperature in resonator cavity 222 cannot be stabilized in utmost point low temperature to resonator cavity 222 heat conduction in utmost point low temperature environment.
4 fairleads 219 are for being incorporated into the lead-in wire (as optical fiber) of concentric cable 213, test lead A214, test lead B215 or other classes the bottom of specimen holder 200.Its top is welded in the bottom surface of crown box 201.Its bottom extend into the bottom of specimen holder 200.4 fairleads 219 are fixed together with waveguide 218 by 5 plate rack discs 220, and its bottom is inserted in the outer circular hole of bottom fixing frame 221.4 fairleads 219 adopt the titanium pipe that thermal conductivity is low to make, to prevent that it from causing the sample temperature in resonator cavity 222 cannot be stabilized in utmost point low temperature to resonator cavity 222 heat conduction in utmost point low temperature environment.
5 plate rack discs 220 are for set wave conduit 218 and 4 fairleads 219.On 5 plate rack discs 220, have center big hole and four small sircle holes of the position symmetry on the edge of keeping to the side, on its edge, leave two orthogonal side channels in orientation, the needs of the decompression of bleeding in specimen holder while lowering the temperature to meet decompression.
Using method and the process of this patent are as follows: first specimen holder 200 is lain against on platform, with elastic sponge, make its sample shaft (being waveguide 218 and 4 fairlead 219 parts) maintenance level in padded its two ends respectively.Sample is positioned over to resonator cavity 222 inside and fixes, then resonator cavity 222 is connected and is fixed with bottom fixing frame 221 use screws, and guarantee that resonator cavity 222 axis overlap with waveguide 218 axis.By the crown lid 202 of specimen holder 200 by fixed hinge 204 and fixed hinge 205 and crown box 201 closures get up (if be closed, this step can be saved).Ready specimen holder 200 is lifted; movement is near the top interface of cooled cryostat 301; then holded up; and insert lentamente (the available mechanical hook-up that hangs of this step is assisted) from the top interface of cooled cryostat 301; until the protective cover 203 of specimen holder 200 and the top interface of cooled cryostat 301 contact (will guarantee that sealing shroud ring flange 217 has been positioned at the top interface of cooled cryostat 301 before inserting specimen holder 200); now resonator cavity 222 and sample have entered profound hypothermia and high-intensity magnetic field center, and now whole system as shown in Figure 5.Insertion process is wanted slowly, and this is because internal-external temperature difference is huge, is slowly inserted with and is beneficial to protection system and sample, also can save cryogenic media (liquid helium).In the whole process of insertion specimen holder 200, will guarantee has higher than atmospheric high-purity helium and discharges from the top interface of cooled cryostat 301.By the 217 tight bundle fastenings for place, place of sealing shroud ring flange.Then crown lid 202 is opened slightly, to the air in crown box 201 is drained.Stop making its sealing to the cooled cryostat 301 high-purity helium of input closed crown lid 202.Outer, coaxial cable is connected with the outer end of coaxial waveguide conversion head 208, to microwave transmission is located to the bottom sample place of specimen holder 200.Another root outer, coaxial cable is connected with the outer end of concentric cable adapter 209, to receive and measure responding microwave.When carrying out contact type measurement, the outer end of p-wire adapter A210 or p-wire adapter B211 is connected with exterior shield cable.Connect after system, cryogenic liquid liquid helium is injected into sample place, now in the low temperature of sample in about 4.2K, to the decompression of bleeding of the sample chamber of cooled cryostat 301, the temperature in sample chamber can be down to about 1.3K.Treat that system stability arrives required probe temperature, can carry out microwave measurement to sample.
This patent tool has the following advantages: waveguide and concentric cable are introduced to specimen holder simultaneously, microwave signal in very wide power and frequency range can be imported on the sample in utmost point low temperature, strong magnetic field circumstance, realize the original position microwave measurement of solid material electrical properties.Waveguide body material has adopted the titanium of lower thermal conductivity, can guarantee sample temperature stablizing under utmost point low temperature.
Accompanying drawing explanation
Fig. 1: specimen holder 200 basic block diagram.In figure, each several part is: crown box 201, crown lid 202, protective cover 203, fixed hinge 204, fixed hinge 205, frequency multiplier 206, square circle converter 207, coaxial waveguide conversion head 208, concentric cable adapter 209, p-wire adapter A210, p-wire adapter B211, coaxial waveguide connecting line 212, concentric cable 213, test lead A214, test lead B215, sealing O shape circle 216, sealing shroud ring flange 217, waveguide 218, 4 fairleads 219, 5 plate rack discs 220, bottom fixing frame 221, resonator cavity 222.
Fig. 2: fixed hinge 204 and fixed hinge 205 three-dimensional structure schematic diagram.
Fig. 3: 5 plate rack disc 220 planar junction signal compositions.
Fig. 4: bottom fixing frame 221 three-dimensional structure schematic diagram.
Fig. 5: specimen holder 200 principle of work schematic diagram.In figure, each several part is: specimen holder 200 is all, cooled cryostat main body 301, superconducting magnet 302, sample 303.
Embodiment
According to patent content and accompanying drawing, explanation provides a good example of this patent below, in conjunction with example, further illustrates the art of this patent details, architectural feature and functional characteristics.But this example does not limit this patent scope, conforming with the example of describing in summary of the invention and accompanying drawing explanation all should be included within the scope of this patent.
The all parts of specimen holder 200 all require non magnetic, otherwise can damage and disturb under high-intensity magnetic field.Crown box 201, crown lid 202, protective cover 203, fixed hinge 204, fixed hinge 205,5 plate rack discs 220 and bottom fixing frame 221 are all selected non-magnetic stainless steel material, and waveguide 218 and 4 fairleads 219 are titanium material.Wherein the diameter of waveguide 218 is 10.0mm, and the diameter of 4 fairleads 219 is 5.6mm, and the diameter of 5 plate rack discs 220 is 3.5cm, and thickness is 1mm.The diameter of bottom fixing frame 221 resonant cavity 222 is 3.5cm.
Coaxial waveguide conversion head 208 and concentric cable adapter 209 adopt side entering type structure, applicable frequency 20～40GHz, relative bandwidth 41%, the outer concentric cable of outside adaptive microwave signal source, interface is bolt type, the inner Waveguide interface that connects frequency multiplier 206, and interface is nested type.The concentric cable adapter 209 equal connecting coaxial cables in both sides, external tapping is that bolt type is identical with coaxial waveguide conversion head 208, and inner joint is nested type, and concentric cable 213 inserts wherein, and interior outer conducting layer is connected respectively.
P-wire adapter A210 is 19 pin male sockets, and p-wire adapter B211 is 21 pin male sockets.The test lead A214 being connected with them respectively or test lead B215 are the enamel-cover copper conductor of the multicore mutually insulated of respective needle number.
Claims (7)
1. a non-contact type low temperature magnetic transports the specimen holder of test, it comprises crown box (201), crown lid (202), protective cover (203), fixed hinge (204), fixed hinge (205), frequency multiplier (206), square circle converter (207), coaxial waveguide conversion head (208), concentric cable adapter (209), p-wire adapter A (210), p-wire adapter B (211), coaxial waveguide connecting line (212), concentric cable (213), test lead A (214), test lead B (215), sealing O shape circle (216), sealing shroud ring flange (217), waveguide (218), 4 fairleads (219), 5 plate rack discs (220), bottom fixing frame (221) resonant cavity (222), it is characterized in that:
Crown box (201) and protective cover (203) and waveguide (218), 4 fairleads (219) welding; waveguide (218) is fixed together by 5 plate rack discs (220), bottom fixing frame (221) with 4 fairleads (219); resonator cavity (222) is connected with bottom fixing frame (221) by screw; waveguide (218) is fixed on the center hole of 5 plate rack discs (220) and bottom fixing frame (221), and 4 fairleads (219) are fixed on the symmetrical circular hole in edge of 5 plate rack discs (220) and bottom fixing frame (221); Matching of crown lid (202) diameter and crown box (201), seals by sealing O shape circle (216) and crown box (201) with fixed hinge (204) and fixed hinge (205); Concentric cable (213), test lead A (214) and test lead B (215), its one end respectively enters specimen holder bottom sample place by any one in 4 fairleads (219), and its other end is connected with concentric cable adapter (209), p-wire adapter A (210), p-wire adapter B (211) respectively.
2. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: described crown box (201), crown lid (202), protective cover (203), fixed hinge (204), fixed hinge (205), sealing shroud ring flange (217), 5 plate rack discs (220), bottom fixing frame (221) all adopt non-magnetic stainless steel to make.
3. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: described waveguide (218) and 4 fairleads (219) adopt the titanium of high rigidity lower thermal conductivity to make.
4. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: described crown box (201), its open top, its bottom and protective cover (203) top seal welding, and with waveguide (218) and fairlead (219) seal welding; On its top side wall cross section, leave semi-circular recesses to place sealing O shape circle (216), to seal with crown lid (202); Its top side wall both sides are welded with respectively horizontal support thick stick, respectively in order to be connected and fixed hinge (204) and fixed hinge (205); On its sidewall, have four circular ports, respectively in order to place coaxial waveguide conversion head (208), concentric cable conversion head (209), p-wire adapter A (210) and p-wire adapter B (211); Its inner bottom surface and square circle converter (207) welding; Frequency multiplier (206) and square circle converter (207) can be placed in its inside, and frequency multiplier (206) is justified converter (207) by square and is connected with waveguide (218).
5. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: on 5 described plate rack discs (220), have center big hole and four small sircle holes of position symmetry on the edge of keeping to the side, on its edge, leave mutually vertically bleed in specimen holder when the meeting decompression cooling side channel of decompression needs of two orientation.
6. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: described bottom fixing frame (221), its top jam-pack is in waveguide (218) and 4 fairleads (219) lower surface, parallel both arms are stretched out in its underpart, for resonator cavity (222), connect.
7. a kind of non-contact type low temperature magnetic according to claim 1 transports the specimen holder of test, it is characterized in that: described resonator cavity (222) is hand basket shape, sample is positioned in its bottom chamber, parallel both arms are stretched out on its top, connect with the parallel both arms coupling of bottom fixing frame (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320623628.8U CN203535204U (en) | 2013-10-10 | 2013-10-10 | Sample rod for contactless low-temperature magneto-transport tests |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320623628.8U CN203535204U (en) | 2013-10-10 | 2013-10-10 | Sample rod for contactless low-temperature magneto-transport tests |
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| CN203535204U true CN203535204U (en) | 2014-04-09 |
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| CN201320623628.8U Withdrawn - After Issue CN203535204U (en) | 2013-10-10 | 2013-10-10 | Sample rod for contactless low-temperature magneto-transport tests |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103885010A (en) * | 2014-04-16 | 2014-06-25 | 中国科学院半导体研究所 | SQUID sealing cavity system for magnetic and electrical property synchronous measurement |
| CN105911029A (en) * | 2016-01-13 | 2016-08-31 | 中国科学院上海技术物理研究所 | System for measuring sample photoluminescence under deep low temperature and intense magnetic field |
| CN114035131A (en) * | 2021-11-08 | 2022-02-11 | 之江实验室 | Device for detecting electric transport property of magnetic material at normal temperature and measuring method |
-
2013
- 2013-10-10 CN CN201320623628.8U patent/CN203535204U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103885010A (en) * | 2014-04-16 | 2014-06-25 | 中国科学院半导体研究所 | SQUID sealing cavity system for magnetic and electrical property synchronous measurement |
| CN103885010B (en) * | 2014-04-16 | 2016-04-13 | 中国科学院半导体研究所 | For the SQUID annular seal space system of magnetics and electrical properties synchro measure |
| CN105911029A (en) * | 2016-01-13 | 2016-08-31 | 中国科学院上海技术物理研究所 | System for measuring sample photoluminescence under deep low temperature and intense magnetic field |
| CN105911029B (en) * | 2016-01-13 | 2018-10-19 | 中国科学院上海技术物理研究所 | A kind of system for measuring sample luminescence generated by light under profound hypothermia high-intensity magnetic field |
| CN114035131A (en) * | 2021-11-08 | 2022-02-11 | 之江实验室 | Device for detecting electric transport property of magnetic material at normal temperature and measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140409 Effective date of abandoning: 20160113 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140409 Effective date of abandoning: 20160113 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |