ISSN:
1572-9605
Keywords:
Critical current
;
Ag/Bi-2223 tape
;
flux creep
;
ac susceptibility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract True zero-field critical current densityJ c of a well-characterized BPSCCO/Ag tape has been determined by means of high-resolution ac susceptibility in the temperature range 77–110 K. The resultant values (30,000 A/cm2 at 77 K) agree well with the transportJ c of the same tape. Because of a very thin BPSCCO, the coreJ c determined from the imaginary part of the ac susceptibility is nearly the same as the zero field one. AllJ c 's follow the same (1-T/T c )n withn=1.45 dependence.J c shows an approximateH −0.5 field dependence over the explored temperature range. Accordingly, the variations ofJ c withT andH seem to be determined by the flux creep.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01320874
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