New T1‐based superconductor T1PbSrRCuO without Ca with Tc above 100 K
作者:
Z. Z. Sheng,
Y. Xin,
J. M. Meason,
期刊:
AIP Conference Proceedings
(AIP Available online 1991)
卷期:
Volume 219,
issue 1
页码: 500-509
ISSN:0094-243X
年代: 1991
DOI:10.1063/1.40248
出版商: AIP
数据来源: AIP
摘要:
Ca‐free T1PbSrRCuO samples (R=rare earths) with Tc up to above 100 K were prepared, and studied by resistance and ac susceptibility measurements and by powder x‐ray diffraction analyses. A 1212‐type phase (Tl1−xPbx)Sr2(Sr1−yRy)Cu2Ozis responsible for the observed supercondcutivity. A rare‐earth is required for the formation of the 1212 phase. Pb‐dopping is necessary to increase the Tc of the 1212 phase from 90 K to above 100 K.
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