Superconductivity of New Compounds in the Systems Tl-Ln-Sr-Cu-O (Ln=Pr and Nd) and Tl-Pb-Ln-Sr-Cu-O (Ln=Pr, Nd and Sm)

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概要

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• Superconductivity of new compounds with the T_c at about 40 K in the Tl-Ln-Sr-Cu-O (Ln=Pr and Nd) and the Tl-Pb-Ln-Sr-Cu-O (Ln=Pr, Nd and Sm) systems has been revealed through the temperature dependence of the resistivity and ac susceptibility. Introduction of PbO into the Tl-Ln-Sr-Cu-O system is found to stabilize the superconducting phase. The structure of the material in the Tl-Pb-Ln-Sr-Cu-O system can be regarded as tetragonal, and the composition may be described as (Tl, Pb)(Ln, Sr)_2CuO_x with the Ln/Sr molar ratio of 0.5.

• 社団法人応用物理学会の論文
• 1989-02-20

著者

• Itoh T

  Ceramics Research Laboratory Onoda Cement Co. Ltd.

• ITOH Takao

  Ceramics Research Laboratory, Onoda Cement Co., Ltd.

• Uchikawa Hiroshi

  Ceramics Research Laboratory Onoda Cement Co. Ltd.

• Itoh Takao

  Ceramics Research Laboratory Onoda Cement Co. Ltd.

関連論文

• Synthesis of a Tl-Ba-Ca-Cu-O Superconductor and Its Properties : Electrical Properties of Condensed Matter
• Superconductivity of New Compounds in the Systems Tl-Ln-Sr-Cu-O (Ln=Pr and Nd) and Tl-Pb-Ln-Sr-Cu-O (Ln=Pr, Nd and Sm)
• Formation and Degradation of the 120 K T_c Phase in the Tl-Pb-Sr-Ca-Cu-O System
• Superconductivity and Structure of (Tl, Pb)((Eu, La), Sr)_2CuO_x
• Preparation and Properties of Bulk Superconductors in the Tl-Pb-Sr-Ca-Cu-O system : Electrical Properties of Condensed Matter

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