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Superconductivity in Perovskite Ba 1−x K x Bi 0.30 Pb 0.70 O 3−δ
Author(s) -
Ma Xing,
Firdous Attia,
Zhang Lei,
Wu Shijie,
Zhang Jianxiang,
Liu Laijun,
Wang Yan,
Geng Jinling,
Sun Junliang,
Li Guobao,
Liao Fuhui,
Lin Jianhua
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900093
Subject(s) - bismuth , electrical resistivity and conductivity , superconductivity , perovskite (structure) , solid solution , crystallography , materials science , high temperature superconductivity , analytical chemistry (journal) , mineralogy , chemistry , physics , condensed matter physics , metallurgy , chromatography , quantum mechanics
Perovskites Ba 1−x K x Bi 0.30 Pb 0.70 O 3−δ (0.0 ≤ x ≤ 0.25) have been synthesized under 660 °C. P1 space group can describe well the structure of this solid solution. The valences are +3 and +5 for bismuth, +2 and +4 for lead in these compounds. The T c zer ° (the highest temperature at which the sample shows zero electrical resistivity) of Ba 1−x K x Bi 0.30 Pb 0.70 O 3−δ first increases from 8.2 K for x=0.02 to 11.4 K for x=0.15, then decreases about to 10.4 K for x=0.25.