Identification of oxygen vacancies in YBaCuO superconductors by high-resolution electron microscopy

作者：Y. H. Liang, Jiale Chen, D. Feng · 发表于：Applied Physics Letters · 年份：1989 · DOI：10.1063/1.101452 · 被引用次数：2 · 研究领域：Physics of Superconductivity and Magnetism、Magnetic and transport properties of perovskites and related materials、Advanced Condensed Matter Physics

High-resolution electron microscopy studies as well as computer simulation studies on oxygen vacancies in Y-Ba-Cu-O superconductors show that the existence of oxygen vacancies at {0, 1/2, 0} sites leads to the distortions of structural images. For certain imaging conditions, the spots corresponding to the column of oxygen vacancies can be distorted heavily, so that the indirect image of oxygen vacancies in Y-Ba-Cu-O superconductors may be acquired. The results reveal that even in local area the oxygen vacancies may be distributed regularly.