SUPERCONDUCTIVITY IN NEARLY SINGLE-PHASE BI-PB-SR-CA-CU-O SAMPLES WITH DIFFERENT NOMINAL COMPOSITIONS

Authors
BALCHEV N KOVACHEVA D LOVCHINOV V KONSTANTINOV K PETROV K
Citation
N. Balchev et al., SUPERCONDUCTIVITY IN NEARLY SINGLE-PHASE BI-PB-SR-CA-CU-O SAMPLES WITH DIFFERENT NOMINAL COMPOSITIONS, Journal of superconductivity, 6(1), 1993, pp. 49-54
Citations number
17
Journal title
Journal of superconductivity → ACNP
ISSN journal
08961107
Volume
6
Issue
1
Year of publication
1993
Pages
49 - 54
Database
ISI
SICI code
0896-1107(1993)6:1<49:SINSBS>2.0.ZU;2-Y
Abstract
The preparation conditions, phase composition, and superconducting pro perties of Bi-Pb-Sr-Ca-Cu oxide materials from different nominal compo sitions have been investigated. Nearly single-phase samples from Bi2Pb 0.4Sr2Ca3Cu4Oy, as well as from the proposed compositions Bi1.8Pb0.4Sr 2Ca3Cu4Oy and Bi1.8Pb0.4Sr2Ca2.5Cu3.5Oy were obtained by a solid-state reaction in air. Samples with the third nominal composition showed th e best superconducting properties (T(on) = 111 K and zero resistance a t T0 = 103 K). A possible mechanism for the 2223 phase formation in th e three investigated compositions has been discussed.