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Nondestructive magneto-optical imaging analysis of superconducting (Bi, Pb)2Sr2Ca2Cu3Ox composites

  • M. Turchinskaya (a1), D. L. Kaiser (a1), A. J. Shapiro (a1), G. N. Riley (a2) and C. Christopherson (a2)...

Abstract

The superconducting filaments in (Bi, Pb)2Sr2Ca2Cu3Ox/Ag composite tapes have been imaged directly through the outer silver sheath of an unpolished tape by means of a magneto-optical imaging technique. The images reveal the morphology and alignment of the uppermost layer of filaments located as much as 112 μm below the unpolished tape surface, the depths of these filaments, and the homogeneity of the magnetic flux distribution within these filaments. These results demonstrate that the magneto-optical technique is a valuable nondestructive tool for analyzing (Bi, Pb)2Sr2Ca2Cu3Ox composite tapes.

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