Oxide superconductor and production method for same

A technology of oxide superconducting layer and manufacturing method, which is applied in the direction of cable/conductor manufacturing, superconducting magnet/coil, chemical instruments and methods, etc., and can solve problems such as increased resistance and decreased critical current characteristics

Inactive Publication Date: 2012-12-26
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the current value increases or the magnetic field becomes stronger, the Lorentz force increases, so the resistance also increases, and the critical current characteristic decreases.

Method used

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  • Oxide superconductor and production method for same
  • Oxide superconductor and production method for same
  • Oxide superconductor and production method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0082] Using the sputtering method, Al was applied to a strip-shaped substrate made of HASTELLOY C276 (Haynes International, Inc. registered trademark) with a width of 5 mm and a thickness of 0.1 mm. 2 o 3 (Anti-diffusion layer; film thickness 150nm) film formation. Next, use ion beam sputtering method to make Y 2 o 3 (bed layer; film thickness 20nm) film formation. Next, MgO (middle layer; film thickness: 10 nm) was formed on the bed layer by ion beam assisted deposition (IBAD method). Then, the CeO 2 (Cover layer: film thickness 500nm) film formation.

[0083] Next, use figure 2 The shown laser evaporation device 20 utilizes the pulsed laser deposition method (PLD method), on Ce 2 An RE123-based oxide superconducting layer with a film thickness of 1.0 μm was formed on the O layer, and Ag (stabilizing layer) with a thickness of 10 μm was sputtered on the oxide superconducting layer to prepare an oxide superconductor. It should be noted that the film formation of the ...

Embodiment 2

[0090] (Example 2: Tb 4 o 7 Incorporation studies)

[0091] As a target, use the GdBa 2 Cu 3 o y Tb was mixed into the powder in Table 1 4 o 7 The oxide superconductors of Samples 1 to 6 were produced in the same manner as in Example 1 except that the oxide superconducting layer was formed by sintering the sintered body obtained by sintering the powder.

[0092] The critical current Ic0 of the obtained oxide superconductors of Samples 1 to 6 was measured at the liquid nitrogen temperature (77K) and without a magnetic field (0T). The critical current Ic was also measured when a magnetic field of 0.5T was applied at a magnetic field angle of θ=45° (45° to the c-axis) at the temperature of liquid nitrogen (77K). For the oxide superconductors of Samples 1 to 6, the rate of change of critical current Ic / Ic0 at a magnetic field application angle θ=45° was calculated. Record the results in Table 1.

[0093] Table 1

[0094]

[0095] As can be seen from the results shown ...

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Abstract

The disclosed oxide superconductor is provided with a substrate and an oxide superconducting layer which is formed on the substrate. The oxide superconducting layer is formed from an oxide superconductor represented by the structural formula: RE1Ba2Cu3Oy (in the formula RE represents a rare earth element, and 6.5<y<7.1), and has a Tb-containing hetero-phase dispersed therein.

Description

technical field [0001] The present invention relates to oxide superconductors and methods for their manufacture. [0002] this application claims priority based on Japanese Patent Application No. 2010-097808 for which it applied to Japan on April 21, 2010, and uses the content here. Background technique [0003] RE123 series oxide superconductor, by RE 1 Ba 2 Cu 3 o y (RE: rare earth elements such as Y, Gd, 6.5<y<7.1) means that it has a critical temperature higher than the temperature of liquid nitrogen (77K), and it is expected to be used in superconducting devices, transformers, current limiters, motors or Superconducting devices such as magnets. [0004] In general, superconductors formed using RE123-based oxide superconductors with good crystal orientation exhibit high critical current characteristics in the absence of a magnetic field. However, when a magnetic field is applied to a superconductor in a superconducting state and a current is passed, Lorentz f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06C01G1/00C01G3/00H01B13/00H01F6/06
CPCH01L39/2432H01L39/2441H01L39/2422H01L39/2435H01L39/126H01L39/128H01L39/2419H01L39/2438H01L39/2448H10N60/857H10N60/0521H10N60/0828H01B12/06H01B13/00C01G1/00C01G3/00H10N60/858H10N60/0296
Inventor 五十岚光则
Owner THE FUJIKURA CABLE WORKS LTD
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