铋铅锶钙铜氧超导体中类相变的X光衍射研究  

XRD STUDY ON Bi_(1.7)Pb_(0.3)Sr_2Ca_2Cu_3O_(10)

作　　者：陈沙鸥[1] 沈惠敏[1] 柏林森[1] 孙诚[1] 杨震[1] 朱育平[1] 王业宁[1] 曹国辉[1] 

机构地区：[1]南京大学固体微结构国家实验室,北京科技大学材料物理系

出　　处：《低温物理学报》1994年第5期358-362,共5页Low Temperature Physical Letters

摘　　要：本文用ＸＲＤ方法得到了Ｂｉ２２２３相八条主要衍射线强度随温度变化的关系，计算了各向异性热系数的大小．结果表明在２００～２５０Ｋ，１００～１５０Ｋ存在着类相变现象，它们与晶格不稳定性有关．Abstract X-ray powder diffraction measurements on Bi1.7Pbo.3Sr2Ca2Cu3O10 ceramics have been car ried out. The variation of X-ray diffraction intensities and anisotropic thermal parameters ΔBijT have anomalies in both the range of 200-250K and the range of 100-150K. These results show there exist phase-like-transition in the two temperature ranges. It may be related to the lat tice instability.

关 键 词：超导体 类相变 X射线衍射 铋2223 

分 类 号：O511.1[理学—低温物理]