Extended range of superconducting bismuthates K1-xAxBiO3 (A = La, Bi, and Ca)

N. R. Khasanova; K. Yoshida; A. Yamamoto; S. Tajima

doi:10.1016/S0921-4534(01)00122-8

Extended range of superconducting bismuthates K_1-xA_xBiO₃ (A = La, Bi, and Ca)

N. R. Khasanova, K. Yoshida, A. Yamamoto, S. Tajima

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

Synthesis and physical properties of new superconducting bismuthates, K_1-xA_xBiO₃ (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), T_c 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 T_c in this class of materials.

Original language	English
Pages (from-to)	12-22
Number of pages	11
Journal	Physica C: Superconductivity and its applications
Volume	356
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(01)00122-8
Publication status	Published - 2001 Jan 7
Externally published	Yes

Keywords

Bismuthates
High-pressure technique
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(01)00122-8

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title = "Extended range of superconducting bismuthates K1-xAxBiO3 (A = La, Bi, and Ca)",

abstract = "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.",

keywords = "Bismuthates, High-pressure technique, Superconductivity",

author = "Khasanova, {N. R.} and K. Yoshida and A. Yamamoto and S. Tajima",

note = "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. Copyright: Copyright 2007 Elsevier B.V., All rights reserved.",

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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. Copyright: Copyright 2007 Elsevier B.V., All rights reserved.

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.

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