Possible high Al substitution in the Tl-Ba-Ca-Cu-O superconducting system

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, , Citation Meng Xianren et al 1990 Chinese Phys. Lett. 7 137 DOI 10.1088/0256-307X/7/3/011

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1 Department of Physics, Beijing Normal University, Beijing 100875

2 Institute of Physics, Academia Sinica, Beijing 100080

Dates

  1. Received 3 November 1989
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0256-307X/7/3/137

Abstract

The Al substitution in the Tl-Ba-Ca-Cu-O superconducting system was studied. Up to 70% of Tl can be substituted by Al, without significant reduction of Tc. X-ray diffraction indicates partial Al substitution does not alter the crystal structure of the 2223 phase. Excessive Al formed Al-Cu alloy and unidentified phases, which gradually destroyed the superconductivity.

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