High-Tc Superconductor Produced by Oxidization of Melt-Spun Ag-Ho-Ba-Cu Alloy Ribbon
Abstract
A (Ho0.17Ba0.33Cu0.5)50Ag50 alloy ribbon with a non-equilibrium structure was produced by melt-spinning. Heating of the alloy ribbon in air brought about the structural change to a stable metallic phase at about 610 K, followed by the formation of Ho1Ba2Cu3O6.7 and Ag in the range of 630 to 740 K. The mixed materials of Ho1Ba2Cu3O6.7 and Ag produced by oxidization of the melt-spun ribbon exhibited high-Tc superconductivity with onset at 90 K and zero resistance at 80 K. It is notable that the mixture of Ag enables us to produce an alloy ribbon by melt-spinning even in the Ho-Ba-Cu alloy system with large miscibility gap.
- Publication:
-
Japanese Journal of Applied Physics
- Pub Date:
- February 1988
- DOI:
- 10.1143/JJAP.27.L195
- Bibcode:
- 1988JaJAP..27L.195M
- Keywords:
-
- High Temperature Superconductors;
- Melt Spinning;
- Mixed Oxides;
- Oxidation;
- Ribbons;
- Silver Alloys;
- Barium Alloys;
- Copper Alloys;
- Current Density;
- Holmium;
- Miscibility Gap;
- X Ray Diffraction;
- Solid-State Physics