Examination of current limiting mechanisms in monocore Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub x/ tape with high critical current density

Anatolii Polyanskii, David Feldmann, S. Patnaik, Jianyi Jiang, X. Y. Cai, D. C. Larbalestier, K. DeMoranville, D. Yu, R. Parrella

IEEE Transactions on Applied Superconductivity · 2001 · 21 citations · 4 references

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Abstract

Magneto-optical imaging, electromagnetic measurements and SEM have been used for the characterization of a monocore BSCCO tape made by oxide powder-in-tube process which had a transport J/sub c/ (77 K, 0 T) of 37 kA/cm/sup 2/. Our study evaluates the connectivity between superconducting grains and reconstructs the local current distribution at <10 /spl mu/m scale. Some local regions are found to carry up to 180 kA/cm/sup 2/ at 77 K, a new record for BSCCO wires.

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