High-Tc Superconductor Prepared by Oxidization of a Melt-Spun Eu1Ba2Cu3 Alloy Ribbon
- 1 October 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (10A) , L1610-1612
- https://doi.org/10.1143/jjap.26.l1610
Abstract
An Eu1Ba2Cu3 alloy ribbon with a nonequilibrium structure including an amorphous phase was prepared by melt-spinning. Heating of the alloy ribbon in air resulted in the structural change to a crystalline metallic phase at about 475 K, followed by the oxide formation of Eu1Ba2Cu3O6.5-6.7 at temperatures above about 555 K. The Eu1Ba2Cu3O6.7 prepared by oxidization of the melt-spun alloy ribbon was found to exhibit high-T c superconductivity with onset at 93 K and zero resistance at 87 K, even though the J c value at 4.2 K was as low as about 20 A/ cm2 in the absence of an applied field and 1.3 A/cm2 at H=7.5 T.Keywords
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