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説明:

Yttrium barium copper oxide (YBCO) superconductors are promising candidates for superconducting magnets operating at low temperatures and high magnetic fields, as well as for advanced electric power devices. Commercially available YBCO wires are manufactured in tape form, by depositing a thin YBCO layer atop multiple buffer layers on a metal substrate. This coated conductor structure closely resembles a single crystal, with well-aligned crystallographic axes, thereby exhibiting high critical current densities. However, challenges remain in reducing screening currents and AC losses for practical applications. In this study, we present a multifilamentary YBCO thin film design with patterned elevated stripes, fabricated using photolithography on substrates. Various stripe materials, including SiO2, and Al2O, were evaluated by depositing YBCO on the STO/stripe structures. Magnetooptical imaging demonstrated that non-superconducting stripes separate the superconducting regions, irrespective of the stripe material used. Transmission electron microscopy (TEM/STEM)-EDX analysis revealed that YBCO on STO/SiO₂ stripes formed crystals with varied orientations, whereas STO/Al₂O₃ stripes resulted in the formation of impurity phases. These findings indicate that substrate patterning with stripe structures is a viable approach for realizing multifilamentary coated conductors, potentially reducing AC losses and enhancing future superconductor applications.

権利情報:

• In Copyright
  

キーワード: Coated conductors, Multifilamentary superconductors, Photolithography, Photolithography, YBa2Cu3Ox

刊行年月日: 2026-01-19

出版者: Institute of Electrical and Electronics Engineers (IEEE)

掲載誌:

• IEEE Transactions on Applied Superconductivity (ISSN: 10518223) vol. 36 issue. 5 p. 1-4

研究助成金:

• Advanced Research Infrastructure for Materials and Nanotechnology

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6174

公開URL: https://doi.org/10.1109/tasc.2026.3655686

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更新時刻: 2026-02-08 08:30:23 +0900

MDRでの公開時刻: 2026-02-07 17:34:52 +0900