Thallum-based high-temperature superconductive film material and its preparation method

A high-temperature superconducting thin film and superconducting thin film technology, applied in the usage of superconducting elements, the manufacture/processing of superconducting devices, superconducting devices, etc. Conductive film and other problems, to achieve the effect of uniform and flat surface morphology and good epitaxy characteristics
CN1317777CInactive Publication Date: 2007-05-23NANKAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANKAI UNIV
Publication Date
2007-05-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to Tl2Ba2CaCu2O8 (Tl-2212) superconducting film and its making method. Its superconducting change temperature is higher than 100K; the critical current density is greater than 1000000 A / sq cm at 77K; at 77K and at 10GHz, its surface resistance is less than 1m Ohm. Its thickness is between 10-1000nm. Its making method mainly two steps; first, depositing Tl-Ba-Ca-Cu-O non-crystalline pioneer film; second, making the high-temperature treatment to convert the non-crystalline pioneer film into the superconducting film. The invention resolves the method to make large area double-sided Tl-2212 extended superconducting film, which can make microwave passive devices or other superconducting electronic ones.
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Description

technical field

[0001] The invention relates to a preparation method of a high-temperature superconducting thin film material, which is a thallium-based high-temperature superconducting material, in particular to a Tl-Ba-Ca-Cu-O superconducting material thin film, in particular to a Tl-based high-temperature superconducting material 2 Ba 2 CaCu 2 O 8 (Tl-2212) Preparation method of superconducting material thin film. Background technique

[0002] High-quality high-temperature superconducting thin films are of great significance in the application of superconducting electronic devices, especially microwave passive devices. In practical applications, the superconducting transition temperature of the superconducting material is required to be at least one-third higher than the working temperature, and has a high critical current density and low microwave surface resistance. In the application of microwave passive devices, it is required to make high-quality double-sided fil...

Claims

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