Improving the screening ability of high-temperature superconductors by combining disk-shaped bulks and closed-loop coated conductors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43930442" target="_blank" >RIV/60461373:22310/24:43930442 - isvavai.cz</a>

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6668/ad44e7/meta" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6668/ad44e7/meta</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6668/ad44e7" target="_blank" >10.1088/1361-6668/ad44e7</a>

Result language

angličtina

Original language name

Improving the screening ability of high-temperature superconductors by combining disk-shaped bulks and closed-loop coated conductors

Original language description

In this work, we demonstrate experimentally the remarkable DC magnetic screening ability of hybrid superconducting screens. The configurations under investigation combine a 30 mm-diameter disk-shaped superconducting bulk, or another with a 10 mm-diameter hole, with different closed superconducting loops made from coated conductors. The loops are placed coaxially with the bulk. The bulk superconductors and the closed-loop coated conductors are made of GdBa2Cu3O7 and the experiments are performed in liquid nitrogen (77 K). The DC and inhomogeneous field to be screened is produced by a bespoke coil and reaches around 100 mT at the location of the superconducting bulk, which is much less than its full-penetration field. By mapping the magnitude of the flux density using a 3-axis cryogenic Hall probe, we show that such a hybrid superconducting screen allows the maximum shielding factor SF above the bulk to be almost doubled. For the best investigated hybrid configuration, the SF reaches ∼ 45 at 2.7 mm above the bulk. In addition, the area of the spatial region for which less than half of the applied field remains (SF &gt; 2 ) is roughly multiplied by 4 when compared to a situation involving only a disk-shaped bulk. In this work, this region corresponds to a 60 mm-diameter circle. The choice of the loop diameter is found to result from a trade-off between maximum SF and extension of the screened region. Finally, we detail why these hybrid configurations bring such improvements: the key point is that the flux lines generated by the source coil are diverted by the bulk towards a region where the closed-loop coated conductors can oppose the best to them. © 2024 IOP Publishing Ltd.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

SUPERCONDUCTOR SCIENCE &amp; TECHNOLOGY

ISSN

0953-2048

e-ISSN

1361-6668

Volume of the periodical

37

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

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UT code for WoS article

001219450900001

EID of the result in the Scopus database

2-s2.0-85193023592