TY - JOUR
T1 - Extended range of superconducting bismuthates K1-xAxBiO3 (A = La, Bi, and Ca)
AU - Khasanova, N. R.
AU - Yoshida, K.
AU - Yamamoto, A.
AU - Tajima, S.
N1 - Funding Information:
The authors wish to thank X.-J. Wu for the help with EDS analysis. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as a part of its Research and Development of Fundamental technologies for the Superconductor Applications Project.
PY - 2001/1/7
Y1 - 2001/1/7
N2 - Synthesis and physical properties of new superconducting bismuthates, K1-xAxBiO3 (A=Bi, La, and Ca), are reported. New compounds could only be prepared in a narrow range of composition, restricted by the A-site cation size, with cubic perovskite structure. For the first two systems (A = Bi, La), Tc was found to depend strongly on composition and was enhanced upon heterovalent substitution. The data obtained and comparison with known bismuthates show undoubtedly that band filling controlled by dopant concentration is a crucial parameter for variation of Tc in this class of materials.
AB - Synthesis and physical properties of new superconducting bismuthates, K1-xAxBiO3 (A=Bi, La, and Ca), are reported. New compounds could only be prepared in a narrow range of composition, restricted by the A-site cation size, with cubic perovskite structure. For the first two systems (A = Bi, La), Tc was found to depend strongly on composition and was enhanced upon heterovalent substitution. The data obtained and comparison with known bismuthates show undoubtedly that band filling controlled by dopant concentration is a crucial parameter for variation of Tc in this class of materials.
KW - Bismuthates
KW - High-pressure technique
KW - Superconductivity
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U2 - 10.1016/S0921-4534(01)00122-8
DO - 10.1016/S0921-4534(01)00122-8
M3 - Article
AN - SCOPUS:0035819251
VL - 356
SP - 12
EP - 22
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -