Method for improving transformation temperature of apical oxygen doping high temperature superconductor

A technology of high-temperature superconductivity and transition temperature, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., and can solve the problem of non-adjustable oxygen content at the top angle
CN101229980AInactive Publication Date: 2008-07-30INST OF PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF PHYSICS - CHINESE ACAD OF SCI
Publication Date
2008-07-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a novel method for increasing superconducting transition temperature Tc, in particular to a method for increasing the superconducting transition temperature Tc by using vertex angel oxygen in sequence. In the invention, a precursor method and a high temperature and high pressure method are used for synthesizing a high temperature superconductor of Sr2CuO3+Delta (Delta is more than zero and less than 1) with a single phase; the material refers to a p-typed high temperature superconductor with a single layer of CuO2 plane and a simple structure and the vertex angle oxygen partly occupied; the high temperature superconductor after synthesized under high temperature is treated thermally with the temperature of the thermal treatment of 50 DEG C to 500 DEG C and the time of the thermal treatment is 0.5 hour to 30 hours. The vertex angle is ordered, the Tc of Sr2CuO3+Delta after synthesized under high pressure increases from 30 to 75 K to 90 to 100 K after thermal treatment in low temperature. The method can be applicable to other systems and can be taken as a new path for developing a higher Tc superconducting material.
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Description

technical field

[0001] The present invention relates to a kind of Sr 2 CuO 3+δ Heat treatment methods for high temperature superconductors. Specifically, it relates to a method for Sr 2 CuO 3+δ The high-temperature superconducting crystal undergoes subsequent heat treatment to increase its high-temperature superconducting transition temperature T c Methods. Background technique

[0002] In terms of lattice structure, high temperature superconductors are composed of CuO 2 The planar conductive layer and the charge storage layer are composed of two parts. By substituting or changing the oxygen content by asymmetric metal cations, the charge pool layer shifts towards CuO 2 The planes provide charge carriers (holes or electrons), giving rise to superconductivity. Doping carrier concentration, CuO in unit cell 2 The number of plane layers is to regulate the superconducting transition temperature T c available parameters. For example, for each copper oxide system, when ...

Claims

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