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Method for producing a hts coated conductor and hts coated conductor with reduced losses

A technology of superconductors and conductors, which is applied in the manufacture/processing of superconductor devices, superconducting devices, electrical components, etc., and can solve the problems of difficult surface morphology of the buffer layer and limiting the positive effect of the pinning center.

Inactive Publication Date: 2012-03-14
BRUKER HTS
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  • Abstract
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  • Claims
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Problems solved by technology

In this method, the surface morphology of the buffer layer is difficult to control, and extended defects are introduced into the HTS film, which in turn limits the positive effect of pinning centers

Method used

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  • Method for producing a hts coated conductor and hts coated conductor with reduced losses
  • Method for producing a hts coated conductor and hts coated conductor with reduced losses
  • Method for producing a hts coated conductor and hts coated conductor with reduced losses

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Embodiment Construction

[0057] figure 1 A schematic cross-sectional view of an HTS-coated conductor 12 of the present invention is shown. It should be noted that all figures are not to scale and particularly show details exaggerated in directions perpendicular to the plane of the substrate.

[0058] The HTS-coated conductor 12 comprises a substantially flat substrate 1, such as a steel strip. On the substrate 1, a substantially planar buffer layer 2, eg CeO, is deposited. This buffer layer 2 generally has a thickness between 300 nm and 1000 nm. Here by locally removing the buffer layer material, the surface 13 of the buffer layer 2 is roughened, resulting in the formation of trench-type roughening structures 7 where the thickness of the buffer layer 2 (perpendicular to the substrate plane) is reduced. Between the roughening structures 7 there are unmachined flat surface regions 6 . In the embodiment shown, this roughening structure 7 is periodic along the substrate plane (note that periodicity is...

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Abstract

A method for producing a high temperature superconductor (=HTS) coated conductor (12), wherein a buffer layer (2; 22) and an HTS layer (4; 24; 65) are deposited on a substrate (1; 21), with the following steps: a) after depositing the buffer layer (2; 22), the surface (2a) is locally roughened, resulting in a roughened surface (13), b) a non-superconducting, closed intermediate layer (3; 23) is deposited on top of the roughened surface (13), c) and the HTS layer (4; 24; 65) is deposited on top of the intermediate layer (3; 23). The invention provides a simple method for producing a HTS coated conductor with reduced losses, and with improved critical current and critical magnetic field.

Description

technical field [0001] The invention relates to a method for producing a conductor coated with a high temperature superconductor (=HTS), wherein a buffer layer and an HTS layer are deposited on a substrate. Background technique [0002] Such a method is known from US 7,491,678 B2. [0003] Superconductors are used to transport electric current at low resistance and thus low power consumption. Superconductors require cryogenic cooling in order to ensure the superconducting state. Compared with conventional superconductors, high-temperature superconductor (=HTS) materials have a higher critical temperature T c , and thus spend less on cooling. In particular, some HTS materials allow the use of liquid nitrogen for cooling. On the other hand, HTS materials exhibit considerably high critical current densities at low temperatures from 3 to 20 K. This property is important for high field magnets used eg in NMR, where the field is so high that the current properties of low temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/24H01L39/00
CPCH10N60/203H10N60/0632H10N60/0828
Inventor K·施伦格A·乌苏斯金
Owner BRUKER HTS
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