M. Fukuda et al., Irreversibility field of Bi-2223 silver-sheathed tape determined with different electric field criteria, PHYSICA C, 357, 2001, pp. 586-589
Dependence of the irreversibility field (B-i) on the electric field criteri
on (E-C) was measured for a Bi-2223 silver-sheathed tape wire using various
measuring methods. It was found that B-i increased monotonically with the
electric field criterion. A good agreement was obtained for B-i between exp
eriments and the theoretical analysis using the flux creep-flow model. This
implies that the resistive property of superconducting wires can be well d
escribed by the mechanism of flux creep and flow. The vortex glass-liquid t
ransition field (B-g) was also determined from E-J curves which measured in
the low and high electric field regions. It was found that B-g also depend
s on the ranges of electric field. This is incompatible with the prediction
of the vortex glass-liquid transition theory. (C) 2001 Elsevier Science BN
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