HIGHLY STRUCTURE-CONFINED Y:Ba:Cu:O SUPERCONDUCTORS PREPARED BY COPRECIPITATION TECHNIQUES
- 20 March 1990
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 04 (06) , 423-431
- https://doi.org/10.1142/s0217984990000556
Abstract
Results from the study of highly structure-confined YBa 2 Cu 3 O 7−x superconductors synthesized by different coprecipitation processes are presented, with the superconducting samples made from oxalic-nitrate salts demonstrating higher critical temperature and critical current in comparison with solid reaction oxides. Among the measured samples, the critical temperature, T c , is typically 90–95 K (T c (maximum)=105 K) and the critical current is 1.2 – 1.9 × 104 A/cm 2 at 4.5 K and 1200 A/cm 2 at 78 K. Peak patterns similar to those of solid-state reactions by X-ray diffraction analysis have also been found although these spectra show considerably broadness. Superconductors resulted from coprecipitation techniques with no calcining (heat-treatment) processing can be attained. Further studies on producing single-crystal with increasing critical current and temperature are discussed.Keywords
This publication has 0 references indexed in Scilit: