Synthesis, thermal stability, structural features, and electromagnetic properties of Bi2+xSr2-xCuO6+δ (0≤x≤0.4)

T. Niinae; Y. Ikeda; Y. Bando; M. Takano; Y. Kusano; J. Takada

doi:10.1016/S0921-4534(98)00702-3

Synthesis, thermal stability, structural features, and electromagnetic properties of Bi_2+xSr_2-xCuO_6+δ (0≤x≤0.4)

T. Niinae, Y. Ikeda, Y. Bando, M. Takano, Y. Kusano, J. Takada

Faculty of Engineering

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

The thermal stability and structural modulation were studied systematically in a wide range of 0≤x≤0.4 for the 2201 phase in the Bi-Sr-Cu-O system, Bi_2+xSr_2-xCuO_6+δ, and it was found that these properties varied remarkably at x≈0.1. Compositions 0≤x<0.1 remained stable only in a narrow low-T high-P_O(2) region and their modulation period changed stepwisely, not continuously, and reversibly between 4.9b (oxidized) and 5.5b (reduced) when the oxygen content was changed only by 0.65%. In relation to this we propose for 0≤x<0.1 specifically that the change in oxygen content induces the exchange of small amounts of Bi and Sr ions between the `BiO' and `SrO' sheets. The superconductivity of the cation-stoichiometric composition (x = 0) was also studied as a function of oxygen content.

Original language	English
Pages (from-to)	29-36
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	313
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(98)00702-3
Publication status	Published - Jan 1 1999

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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Niinae, T., Ikeda, Y., Bando, Y., Takano, M., Kusano, Y., & Takada, J. (1999). Synthesis, thermal stability, structural features, and electromagnetic properties of Bi_2+xSr_2-xCuO_6+δ (0≤x≤0.4). Physica C: Superconductivity and its applications, 313(1-2), 29-36. https://doi.org/10.1016/S0921-4534(98)00702-3

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abstract = "The thermal stability and structural modulation were studied systematically in a wide range of 0≤x≤0.4 for the 2201 phase in the Bi-Sr-Cu-O system, Bi2+xSr2-xCuO6+δ, and it was found that these properties varied remarkably at x≈0.1. Compositions 0≤x<0.1 remained stable only in a narrow low-T high-PO(2) region and their modulation period changed stepwisely, not continuously, and reversibly between 4.9b (oxidized) and 5.5b (reduced) when the oxygen content was changed only by 0.65%. In relation to this we propose for 0≤x<0.1 specifically that the change in oxygen content induces the exchange of small amounts of Bi and Sr ions between the `BiO' and `SrO' sheets. The superconductivity of the cation-stoichiometric composition (x = 0) was also studied as a function of oxygen content.",

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AU - Niinae, T.

AU - Ikeda, Y.

AU - Bando, Y.

AU - Takano, M.

AU - Kusano, Y.

AU - Takada, J.

PY - 1999/1/1

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N2 - The thermal stability and structural modulation were studied systematically in a wide range of 0≤x≤0.4 for the 2201 phase in the Bi-Sr-Cu-O system, Bi2+xSr2-xCuO6+δ, and it was found that these properties varied remarkably at x≈0.1. Compositions 0≤x<0.1 remained stable only in a narrow low-T high-PO(2) region and their modulation period changed stepwisely, not continuously, and reversibly between 4.9b (oxidized) and 5.5b (reduced) when the oxygen content was changed only by 0.65%. In relation to this we propose for 0≤x<0.1 specifically that the change in oxygen content induces the exchange of small amounts of Bi and Sr ions between the `BiO' and `SrO' sheets. The superconductivity of the cation-stoichiometric composition (x = 0) was also studied as a function of oxygen content.

AB - The thermal stability and structural modulation were studied systematically in a wide range of 0≤x≤0.4 for the 2201 phase in the Bi-Sr-Cu-O system, Bi2+xSr2-xCuO6+δ, and it was found that these properties varied remarkably at x≈0.1. Compositions 0≤x<0.1 remained stable only in a narrow low-T high-PO(2) region and their modulation period changed stepwisely, not continuously, and reversibly between 4.9b (oxidized) and 5.5b (reduced) when the oxygen content was changed only by 0.65%. In relation to this we propose for 0≤x<0.1 specifically that the change in oxygen content induces the exchange of small amounts of Bi and Sr ions between the `BiO' and `SrO' sheets. The superconductivity of the cation-stoichiometric composition (x = 0) was also studied as a function of oxygen content.

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