Analytical electron microscopy of high-Tc superconductors in the (Bi, Pb)-Ca-Sr-Cu-O system

被引：0

作者：

Shindo, Daisuke ^{[1
]}

Sato, Hiroshi ^{[1
]}

Liedl, Gerald L. ^{[1
]}

Hiraga, Kenji ^{[1
]}

Kobayashi, Norio ^{[1
]}

Hirabayashi, Makoto ^{[1
]}

Muto, Yoshio ^{[1
]}

机构：

[1] Tohoku Univ, Japan

来源：

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 1989年 / 28卷 / 03期

关键词：

Bismuth Compounds--Structure - Oxides;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Superconductors in the Bi-Ca-Sr-Cu-O system containing a small amount of Pb were investigated by analytical electron microscopy as well as high-resolution electron microscopy. X-ray spectroscopy analysis showed that most of grains in the samples contain approximately the same amount of Pb, and the compositions of the grains with the low-Tc(60 K) phase correspond to (Bi,Pb)1.1(Ca,Sr)1.4Cu1.0Ox. The compositions of the samples containing high-Tc phase differ from grain to grain but indicate higher Cu atomic fraction than that of the low-Tc phase. High resolution electron microscope images directly reveal the modulated structure along the [010] direction with an incommensurate period which is the same as that observed in Bi-Ca-Sr-Cu-O. Electron energy loss spectra were also investigated by means of parallel detection system. The position and shape of the strong peak above the threshold at the oxygen K-edge were discussed relative to data for YBa2Cu3Ox.

引用

页码：415 / 418

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