Possibility of Superconductivity of the 2212 Phase in the Bi(Pb)-Sr-Ce-Cu-O System |
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| Authors: | Hiroyuki Sasakura Yoshiya Akagi Shigeki Tsukui Takashi Oka Motoaki Adachi |
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| Affiliation: | (1) Department of Physics, Hamamatsu University School of Medicine, 1-20-1 Handayama, 431-3192 Hamamatsu Shizuoka, Japan;(2) Research Institute for Advanced Science and Technology, Osaka Prefecture University, 599-8570 Sakai, Osaka, Japan |
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| Abstract: | Synthesis of the Bi-2212 compound in the Bi-Sr-Ce-Cu-O system has been already known. But, there has been no report on superconductivity
of the compound yet. We have prepared many Bi-2212 samples partially substituted by Pb for Bi in the Bi-Sr-Ce-Cu-O system.
The nominal composition is (Bi2−y
Pb
y
)Sr2(Sr1−x
Ce
x
)Cu2O
z
. Then, we have investigated possibility of superconductivity for the samples. As a result, we find that a sample with nominal
composition ofx=0.23 andy=0.1, which is of almost the single 2212 phase, shows an anomaly at about 70 K in addition to temperature dependence of the
resistivity like a semiconductor. Furthermore, the sample also shows a decrease of magnetic susceptibility starting at about
70 K with decreasing temperature. These experimental results can be considered to result from superconductivity of the 2212
phase in the Bi(Pb)-Sr-Ce-Cu-O system. |
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| Keywords: | Bi (Pb)-Sr-Ce-Cu-O system Bi-2212 phase superconductivity |
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