FIZIKA A 4 (1995) 3, 549-560

SUPERCONDUCTIVITY IN Bi 2223 COMPOUND: PHYSICS AND POTENTIAL APPLICATIONS

EMIL BABIĆ^a, IVICA KUŠEVIĆ^a, KREŠO ZADRO^a, JOVICA IVKOV^b, ŽELJKO MAROHNIĆ^b, ĐURO DROBAC^b, MLADEN PRESTER^b, HUA KUN LIU^c, SHI XUE DOU^c, DRAGANA TODOROVIĆ-MARINIĆ^d and AHMED KURŠUMOVIĆ^d
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 90^th 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 B_C2, the coherence lengths, etc.). In addition, the results for the tape provide some technologically relevant parameters (the pinning potential U₀, volume pinning force F_p 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 J_c 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
For problems or questions please contact fizika@fizika.hfd.hr