X-RAY DIFFRACTION AND ELECTRON MICROSCOPIC STUDY OF A NEW HIGH-Tc SUPERCONDUCTOR BASED ON THE Bi-Ca-Sr-Cu-O SYSTEM.

被引：0

作者：

Syono, Yasuhiko ^{[1
]}

Hiraga, Kenji ^{[1
]}

Kobayashi, Norio ^{[1
]}

Kikuchi, Masae ^{[1
]}

Kusaba, Keiji ^{[1
]}

Kajitani, Tsuyoshi ^{[1
]}

Shindo, Daisuke ^{[1
]}

Hosoya, Syoichi ^{[1
]}

Tokiwa, Ayako ^{[1
]}

Terada, Shoji ^{[1
]}

Muto, Yoshio ^{[1
]}

机构：

[1] Tohoku Univ, Sendai, Jpn, Tohoku Univ, Sendai, Jpn

来源：

Japanese Journal of Applied Physics, Part 2: Letters | 1988年 / 27卷 / 04期

关键词：

BISMUTH COMPOUNDS - Structure - CERAMIC MATERIALS - Structure - MICROSCOPES; ELECTRON; -; Applications; X-RAYS; Diffraction;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Observed high-resolution images of a new high-T//c superconductor based on the Bi-Ca-Sr-Cu-O system (T//c above 70 K) indicated a structure derived from the Bi//4Ti//3O//1//2 type in which doubled bismuth oxide layers alternate with double perovskite layers along the c-axis. The orthorhombic unit cell dimensions showed an approximate relation of a equals ROOT 2a//p, b equals 5 ROOT 2a//p and c equals 8 a//p, where a//p equals 3. 82 Angstrom, the cell parameter of a cubic perovskite. At least a quarter of the oxygen should be deleted in accordance with the average copper valence of less than 3 and two-dimensional Cu-O layers are supposed to be responsible for the high-T//c superconductivity.

引用

页码：569 / 572