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Absorption type resonant cavity for measuring sample surface state in profound hypothermia high-intensity magnetic field

A resonant cavity and strong magnetic field technology, which is applied in resonators, measuring devices, and material analysis using microwave means, can solve the problems of difficult sample electrode preparation, sample corrosion, and sample damage, so as to solve the interference of sample body conductance , The method is simple and convenient

Inactive Publication Date: 2014-01-08
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, most of these studies use traditional electrical testing methods, so they are limited by the conductivity of the material substrate, the carriers in the three-dimensional direction, the sample is not easy to corrode and may destroy the sample, and the sample electrode is not easy to prepare.

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  • Absorption type resonant cavity for measuring sample surface state in profound hypothermia high-intensity magnetic field
  • Absorption type resonant cavity for measuring sample surface state in profound hypothermia high-intensity magnetic field

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Embodiment Construction

[0014] A better example of the present invention is given below according to the content of the invention and the accompanying drawings, and the technical details, structural features and functional characteristics of the present invention are further described in conjunction with the examples. However, this example does not limit the scope of the present invention, and the examples described in the summary of the invention and the description of the drawings should be included in the scope of the present invention.

[0015] The coaxial cable assembly 101 adopts a Micro coax UFB311A coaxial cable with high operating frequency, low loss, low standing wave, and good mechanical phase stability, and the operating frequency range is DC to 26.5 GHz.

[0016] The microwave partition and the panel-mounted connector 102 adopt ROD-SMA-KFD (female), and the working frequency range is DC to 18GHz.

[0017] The resonant cavity cover 103, the resonant cavity 104, the copper sheet A105, and ...

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Abstract

The invention discloses an absorption type resonant cavity for measuring the sample surface state in a profound hypothermia high-intensity magnetic field. The resonant cavity mainly consists of a coaxial cable assembly, a microwave separating plate and panel installing type connector, a resonant cavity cover plate, a resonant cavity, a copper sheet A, a copper sheet B, a screw A, a screw B and the like. The resonant cavity is mainly characterized in that microwaves are guided into the resonant cavity in the profound hypothermia high-intensity magnetic field environment by coaxial cables, and the combination of the microwave measurement and the profound hypothermia high-intensity magnetic field transporting measurement is realized. The system provides an effective tool for studying the profound hypothermia magnetic transportation of the surface state of two-dimensional nano-structure materials such as topological insulators.

Description

technical field [0001] The invention relates to an absorption resonator, in particular to an absorption resonator for measuring the surface state of a sample under a deep low temperature and strong magnetic field. By measuring the quality factor (Q factor) method to characterize the surface state of the sample in the resonant cavity and to study the response characteristics of the surface state of the material to microwaves under non-destructive and non-contact conditions. Background technique [0002] Among the test methods related to semiconductor materials and devices, magnetic transport is an important and basic research method, which is used to study basic information such as carrier concentration, type and mobility of materials. Under the condition of deep low temperature, many quantum effects appear. As a correction to the classical conductance, the quantum effect of conductance reflects the physical information such as the spin characteristics of the material. These ...

Claims

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Application Information

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IPC IPC(8): H01P7/06G01N22/00
Inventor 吕蒙俞国林徐勇刚常志刚刘新智林铁孙雷褚君浩
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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