Modulated Structure of High-Tc Superconductor Bi-Ca-Sr-Cu-O Studied by High-Resolution Electron Microscopy and Electron Diffraction
Abstract
An incommensurate atomic displacive modulation has been clearly observed in high-resolution electron micrographs of the superconductive oxide Bi-Ca-Sr-Cu-O in addition to a concentration modulation in Bi layers. A commensurate form of the orthorhombic modulated structure has cell dimensions a{=}0.54, b{=}2.7 and c{=}3.08 nm. Characteristic features of electron diffraction patterns can be explained when transverse and longitudinal displacement waves for metal atoms along [010] are taken into consideration.
- Publication:
-
Japanese Journal of Applied Physics
- Pub Date:
- October 1988
- DOI:
- 10.1143/JJAP.27.L1869
- Bibcode:
- 1988JaJAP..27L1869H
- Keywords:
-
- Atomic Structure;
- Bismuth Oxides;
- Electron Diffraction;
- High Temperature Superconductors;
- Microstructure;
- Mixed Oxides;
- Calcium Oxides;
- Chemical Composition;
- Copper Oxides;
- Electron Microscopy;
- High Resolution;
- Strontium Compounds;
- Solid-State Physics