<正> 1 引言为了寻找性能更好的氧化物超导体,人们对Y-Ba-Cu-O 系氧化物作了多种元素替代。我们制备了Bi-Sr-Ca-Cu-O 系氧化物,测量了交、直流磁化率和电阻与温度的关系。
The samples of Bi-Sr-Ca-Cu-O superconductors was preparedby sintering and casting techniques have been studied.Two super conductivephases have been observed in a casting sample,which was casted at 1100℃and heat treated at 850℃ after solidification.The mag
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