Hiraga K, Oku T, Shindo D, Hirabayashi M
Institute for Materials Research, Tohoku University, Sendai, Japan.
J Electron Microsc Tech. 1989 Jul;12(3):228-43. doi: 10.1002/jemt.1060120306.
Recent studies of high-resolution electron microscopy on the high-Tc superconductors of Y-Ba-Cu-O and Bi-Ca-Sr-Cu-O are presented. The observed images of crystals thinner than 3 nm, taken under conditions that approached the Scherzer defocus condition, directly show the arrangements of cations and oxygen-vacant positions. The results reveal structural characteristics of the atomic scale; this offers important insights into the origin of the high-Tc superconductivity. The usefulness of high-resolution electron microscopy for studying complicated crystal structures is demonstrated for the high-Tc oxides.
本文介绍了对钇钡铜氧（Y-Ba-Cu-O）和铋钙锶铜氧（Bi-Ca-Sr-Cu-O）高温超导材料进行的高分辨率电子显微镜最新研究。在接近谢尔策散焦条件下拍摄的厚度小于3纳米的晶体图像，直接显示了阳离子和氧空位的排列情况。结果揭示了原子尺度的结构特征；这为高温超导性的起源提供了重要见解。高分辨率电子显微镜在研究高温氧化物复杂晶体结构方面的实用性得到了证明。
