Tetragonal-to-orthorhombic transition and disappearance of superconductivity in the Pb-doped Bi2Sr2CuOy system

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机构：
[1] Maeda, Atsutaka
[2] Kato, Yusuke
[3] Shibauchi, Takasada
[4] Nakajima, Yasuyuki
[5] Watanabe, Hiroshi
[6] Uchinokura, Kunimitsu
来源：
Maeda, Atsutaka | 1600年 / 28期
关键词：
Bismuth Compounds--Phase Transitions - Ceramic Materials - Crystals--Structure - Lead and Alloys;
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摘要：
A series of superconductors Bi2.1-xPbxSr1.9CuOy with 0.05&lex&le0.5 were synthesized in polycrystalline form. Tetragonal to orthorhombic transition was found at around x=0.1. By the introduction of Pb, it was found that the average valence of Cu increases, whereas the superconducting transition temperature decreases. The system becomes more metallic with increasing x.
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