THE EFFECT OF BI CONTENT ON THE PHASE PURITY AND THE SUPERCONDUCTING CRITICAL-TEMPERATURE OF A SR AND CA DEFICIENT BI-2212 STOICHIOMETRY

Authors
BAKER AP GLOWACKI BA
Citation
Ap. Baker et Ba. Glowacki, THE EFFECT OF BI CONTENT ON THE PHASE PURITY AND THE SUPERCONDUCTING CRITICAL-TEMPERATURE OF A SR AND CA DEFICIENT BI-2212 STOICHIOMETRY, Physica. C, Superconductivity, 227(1-2), 1994, pp. 31-39
Citations number
20
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
227
Issue
1-2
Year of publication
1994
Pages
31 - 39
Database
ISI
SICI code
0921-4534(1994)227:1-2<31:TEOBCO>2.0.ZU;2-O
Abstract
The change induced by post-synthesis annealing at increased temperatur es in the c-axis length and the superconducting critical temperature ( T(c)) of BixSr1.8Ca0.9Cu2.0 oxide has been studied. The results are re ported for BixSr1.8Ca0.9Cu2.0 oxide, where x = 2.0, 2.1 and 2.2. The B i 2.2 composition shows the expected change in T(c) with the removal o f oxygen from an over-doped high-temperature superconductor. However, there are anomalies for x = 2.0 and 2.1 and these are explained by the presence of Bi9Sr11Ca5 oxide. The differences shown in the measured c -axis and T(c) for the three compositions are related to Bi substituti on on the Sr and Ca sites.