用X 射线旋进照相、电子衍射和TEM 方法观察到Bi 系超导材料中某些类多型结构特征,显示了一维无序结构及衍射的弧化效应、带状结构均与它存在交生现象有关;用类多型结构特征阐明BiO 层结构中Bi~(+++)的位移将导致BiO 层中多余的氧正是其超导电性改变的一种标志。
Some studies of the polytypoidic structure in Bi-system superconductors byX-ray precession photographs,electron diffraction and TEM technique are made.A strongincommensurate modulation reflections were observed by these methods in Bi-system 2223phase.The
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