Superconducting properties and structural stability of Bi2Sr2CaCu2O8+δ compound prepared by electrochemical reduction in protogenic electrolyte

Motohide Matsuda; Hideki Tamada; Kimihiro Yamashita; Takao Umegaki; Michihiro Miyake

doi:10.1557/JMR.1997.0420

Superconducting properties and structural stability of Bi₂Sr₂CaCu₂O_8+δ compound prepared by electrochemical reduction in protogenic electrolyte

Motohide Matsuda, Hideki Tamada, Kimihiro Yamashita, Takao Umegaki, Michihiro Miyake

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

Abstract

Superconducting Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) compound was eleclrochemically reduced in a protogenic electrolyte of benzoic acid dissolved in acetone. The critical temperatures (T_c) of the reduced Bi-2212 were enhanced from 75 K up to ∼90 K, which were reportedly the highest value of Bi-2212 superconductor. In spite of the enhancement of T_c, a diamagnetism of Bi-2212 was weakened after the reduction. This phenomenon was discussed in terms of the flux penetration depth. The electrochemically reduced Bi-2212 had a different structural stability from a partly oxygen-removed Bi-2212 which was prepared by annealing in reducing atmospheres. These results are attributable to injection of protons from the benzoic acid into the Bi-2212 structure.

Original language	English
Pages (from-to)	3214-3218
Number of pages	5
Journal	Journal of Materials Research
Volume	12
Issue number	12
DOIs	https://doi.org/10.1557/JMR.1997.0420
Publication status	Published - Dec 1997

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{534f1fc204034efa9aefeb00f9744e33,

title = "Superconducting properties and structural stability of Bi2Sr2CaCu2O8+δ compound prepared by electrochemical reduction in protogenic electrolyte",

abstract = "Superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) compound was eleclrochemically reduced in a protogenic electrolyte of benzoic acid dissolved in acetone. The critical temperatures (Tc) of the reduced Bi-2212 were enhanced from 75 K up to ∼90 K, which were reportedly the highest value of Bi-2212 superconductor. In spite of the enhancement of Tc, a diamagnetism of Bi-2212 was weakened after the reduction. This phenomenon was discussed in terms of the flux penetration depth. The electrochemically reduced Bi-2212 had a different structural stability from a partly oxygen-removed Bi-2212 which was prepared by annealing in reducing atmospheres. These results are attributable to injection of protons from the benzoic acid into the Bi-2212 structure.",

author = "Motohide Matsuda and Hideki Tamada and Kimihiro Yamashita and Takao Umegaki and Michihiro Miyake",

note = "Funding Information: This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan, and by the Nippon Sheet Glass Foundation for Research and Development of Materials Technology.",

year = "1997",

month = dec,

doi = "10.1557/JMR.1997.0420",

language = "English",

volume = "12",

pages = "3214--3218",

journal = "Journal of Materials Research",

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publisher = "Materials Research Society",

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T1 - Superconducting properties and structural stability of Bi2Sr2CaCu2O8+δ compound prepared by electrochemical reduction in protogenic electrolyte

AU - Matsuda, Motohide

AU - Tamada, Hideki

AU - Yamashita, Kimihiro

AU - Umegaki, Takao

AU - Miyake, Michihiro

N1 - Funding Information: This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan, and by the Nippon Sheet Glass Foundation for Research and Development of Materials Technology.

PY - 1997/12

Y1 - 1997/12

N2 - Superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) compound was eleclrochemically reduced in a protogenic electrolyte of benzoic acid dissolved in acetone. The critical temperatures (Tc) of the reduced Bi-2212 were enhanced from 75 K up to ∼90 K, which were reportedly the highest value of Bi-2212 superconductor. In spite of the enhancement of Tc, a diamagnetism of Bi-2212 was weakened after the reduction. This phenomenon was discussed in terms of the flux penetration depth. The electrochemically reduced Bi-2212 had a different structural stability from a partly oxygen-removed Bi-2212 which was prepared by annealing in reducing atmospheres. These results are attributable to injection of protons from the benzoic acid into the Bi-2212 structure.

AB - Superconducting Bi2Sr2CaCu2O8+δ (Bi-2212) compound was eleclrochemically reduced in a protogenic electrolyte of benzoic acid dissolved in acetone. The critical temperatures (Tc) of the reduced Bi-2212 were enhanced from 75 K up to ∼90 K, which were reportedly the highest value of Bi-2212 superconductor. In spite of the enhancement of Tc, a diamagnetism of Bi-2212 was weakened after the reduction. This phenomenon was discussed in terms of the flux penetration depth. The electrochemically reduced Bi-2212 had a different structural stability from a partly oxygen-removed Bi-2212 which was prepared by annealing in reducing atmospheres. These results are attributable to injection of protons from the benzoic acid into the Bi-2212 structure.

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JF - Journal of Materials Research

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ER -

Superconducting properties and structural stability of Bi₂Sr₂CaCu₂O_8+δ compound prepared by electrochemical reduction in protogenic electrolyte

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