Grain Boundary Diffusion of Oxygen in c-Textured YBa2Cu3O7-δ Films

作     者：Li Li 

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 

出 版 物：《中国地质大学学报(英文版)》 (JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES)

年 卷 期：2001年第12卷第3期

页      面：221-223页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：oxygen diffusion YBa2 Cu3 O7 film 

摘      要：The dislocation structure in magnetron sputtered c-textured YBCO films deposited on (100)SrTiO3 substrates consists of vertical (//c axis) screw dislocation forests together with layered horizontal (|caxis) edge dislocation net-works. It is found that in the oxygenation process in YBCO films, oxygen diffusion is enhanced greatly by the short circuit paths which we suggest to be the horizontally ( c axis) layered edge dislocation net-works. Diffusion equation for oxygenation was solved with the help of Fishers theory of grain boundary diffusion, and an active energy 1.16 ev.``