Superconductivity in nearly single-phase Bi-Pb-Sr-Ca-Cu-O samples with different nominal compositions

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF00618505· OSTI ID:171431

Balchev, N; Lovchinov, V ^[1]; Kovacheva, D; Konstantinov, K; Petrov, K ^[2]

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1. Inst. of Solid State Physics, Sofia (Bulgaria)
2. Inst. of General and Inorganic Chemistry, Sofia (Bulgaria)

The preparation conditions, phase composition, and superconducting properties of Bi-Pb-Sr-Ca-Cu oxide materials from different nominal compositions have been investigated. Nearly single-phase samples from Bi{sub 2}Pb{sub 0.4}Sr{sub 2}Ca{sub 3}Cu{sub 4}O{sub y}, as well as from the proposed compositions Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 3}Cu{sub 4}O{sub y} and Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2.5}Cu{sub 2.5}O{sub y} were obtained by a solid-state reaction in air. Samples with the third nominal composition showed the best superconducting properties (T{sub on} = 111 K and zero resistance at T{sub 0} = 103 K). A possible mechanism for the 2223 phase formation in the three investigated compositions has been discussed. 17 refs., 5 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 171431
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 1 Vol. 6; ISSN 0896-1107; ISSN JOUSEH
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
COPPER COMPOUNDS
FABRICATION
PHASE STUDIES
STRONTIUM COMPOUNDS
SUPERCONDUCTIVITY
SUPERCONDUCTORS