FIZIKA A 4 (1995) 3, 549-560

size 210 kB

SUPERCONDUCTIVITY IN Bi 2223 COMPOUND: PHYSICS AND POTENTIAL APPLICATIONS

EMIL BABIĆa, IVICA KUŠEVIĆa, KREŠO ZADROa, JOVICA IVKOVb, ŽELJKO MAROHNIĆb, ĐURO DROBACb, MLADEN PRESTERb, HUA KUN LIUc, SHI XUE DOUc, DRAGANA TODOROVIĆ-MARINIĆd and AHMED KURŠUMOVIĆd
aDepartment of Physics, Faculty of Science, The University of Zagreb, POBox 162, 10001 Zagreb, Croatia
bInstitute of Physics of the University, POBox 304, 10001 Zagreb, Croatia
cCentre for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia
dCIRM-Energoinvest, Sarajevo, Bosnia and Hercegovina

Dedicated to Professor Mladen Paić on the occasion of his 90th birthday

Received 16 June 1995

The main results of the systematic study of the electron transport properties and AC susceptibility in Pb-doped, almost single phase, Bi 2223 ceramic samples and Ag-clad Bi 2223 tape, are presented. Whereas the results for the ceramic samples can only be used for the study of the percolation problem in the weak-link network, those for tape can yield some intrinsic parameters of Bi 2223 compound (the upper critical fields BC2, the coherence lengths, etc.). In addition, the results for the tape provide some technologically relevant parameters (the pinning potential U0, volume pinning force Fp and the flux-flow viscosity h) and an insight into the nature of dissipation and pinning in these materials. Some factors limiting the critical current density Jc in the present-day tapes are briefly discussed.

UDC 538.945
PACS 74.72.-h, 74.72.Hs, 74.60.Ec, 74.60.Ge
Copyright by The Croatian Physical Society
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