V. Bunda et al., INFLUENCE OF OXOFLUORINE DOPING ON SUPERCONDUCTING PROPERTIES OF SUPERCONDUCTOR BI-PB-SR-CA-CU-O, IEEE transactions on magnetics, 30(2), 1994, pp. 1151-1153
The samples of nominal composition Bi1.6Pb0.4Sr2Ca3Cu4O12-zFz consist
of alpha, beta, gamma, and delta-modifications of phase 2234. We obser
ved the superconducting transition in the temperature region 110-132 K
for samples with z less-than-or-equal-to 0.25. The possible model of
creating superconducting state in Bi1.6Pb0.4Sr2Ca3Cu4O12-zFz samples i
s proposed.