Inductance probe examination of a superconducting Bi-Pb-Sr-Ca-Cu-O ceramic

Abstract EN

The superconducting material with the nominal composition Bi1،6Pb04Sr2Ca2Cu3Ox has been synthesized and examined by the inductance probe method recently described by the authors[ 1 ].

The inductance data shows Tc to be in the range 105 K-110 K, in good agreement with previously reported results [4]; the inductance falls steadily from about 200 K before the main superconducting transition is reached.

The observed drop in inductance indicated that 25% of the volume of the material is superconducting, in contrast to the behavior of YBCO and Tl-Ba-Ca-Cu-0 systems.

Inductance-field measure- ments, at 77 K, below show that the lower critical field HCl = 17 gauss, and the upper critical field Hc2 = 4T, in good agreement with published data [ 11 ].