The Mssbauer Effect of Y-Ba-Cu-Fe-O Superconductive Oxide

作     者：夏思科 马如璋 曹国辉 李正文 冯永荣 

作者机构：University of Science and Technology Beijing China. To whom correspondence should be addressed University of Science and Technology Beijing China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：1989年第5卷第6期

页      面：434-436页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Y-Ba-Cu-Fe-O superconductor Mossbauer effect lattice softening 

摘      要：We have studied the Mossbauer effect of YBa_2Cu_(2.88)Fe_(0.12)O_(7-x) superconductive oxide from 78 to 273K. Two minima of recoilless fraction and Debye temperature were found near 110K and 220K. It means that lattice softening happened near these two temperatures. We also observed minima of isomer shift near 110K and quadrupole splitting increase when temperature is lower than 110K. We suggest that lattice softening would lead to the displacement of oxygen atoms. This may be relative to superconductive transition.