论文部分内容阅读
自从发现不含稀土元素的Bi-系超导电性以来,人们相继地分离出这一系中的纯高温相(110K)和低温相(85K),确定了它们的结构。为获得比较稳定、且易重复的高温相,又做了许多替代Bi的实验,效果最明显的是Pb替代部分Bi,其T_(co)最高者可达108K。后来,中国科学技术大学在此基础上,又用少量Sb替代Bi,结果发现零阻转变温度为132K的
Since the discovery of rare earth element-free Bi-based superconductivity, one has successively separated the pure high-temperature phase (110K) and the low-temperature phase (85K) from this series to determine their structure. In order to obtain a stable and easily reproducible high temperature phase, we have done a lot of experiments to replace Bi. The most obvious effect is that Pb replaces part of Bi with the highest T co (co) of up to 108K. Later, on the basis of this, University of Science and Technology of China replaced a small amount of Sb with Bi, and found that the zero-resistance transition temperature was 132K