Article Dans Une Revue IEEE Transactions on Applied Superconductivity Année : 2019

Flux Pinning Analysis of Superconducting YBCO Foam Struts

Résumé

Magnetization loops were measured on struts of superconducting YBa 2 Cu 3 O x (YBCO, 123-phase) foams taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, flux pinning forces, F p = j c × B, were calculated and pinning force scaling diagrams F p /F p,m ax versus h = H a /H irr were established. The scaling in the temperature range 60 K ࣘ T ࣘ 85 K was found to be well developed for all samples with peak positions, h 0 , above 0.4, which is an indication of δT c pinning. From microstructure analysis using the electron backscatter diffraction technique (EBSD), it is known that the struts are fully converted into the 123-phase with embedded 211 particles being relatively small. The variation of F p depending on the position of the struts in the original sample directly reveals the changes of the texture as found employing EBSD.

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hal-04988898 , version 1 (13-03-2025)

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Michael R Koblischka, Anjela Koblischka-Veneva, Crosby-Soon Chang, Thomas Hauet, E. Sudhakar Reddy, et al.. Flux Pinning Analysis of Superconducting YBCO Foam Struts. IEEE Transactions on Applied Superconductivity, 2019, 29 (3), pp.1-5. ⟨10.1109/tasc.2018.2880334⟩. ⟨hal-04988898⟩
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