Growth of the superconducting phase in ceramic Y1.2Ba0.8CuOy samples
- 25 January 1988
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 52 (4) , 317-319
- https://doi.org/10.1063/1.99505
Abstract
Differently prepared samples with the nominal composition Y1.2Ba0.8CuOy are examined via microscopy, energy dispersive x‐ray analysis, x‐ray diffraction, and measurements of resistivity and susceptibility. Various phases are identified directly. Essentially these are Y2BaCuO5, which forms a matrix with semiconducting and antiferromagnetic properties and YBa2Cu3O7−x, which is present in a dendritic morphology. The dendritic appearance indicates that YBa2Cu3O7−x is formed by nucleation and growth during sintering. Despite the particular growth mechanism of sintered materials a strong analogy exists with dendritic growth during solid‐state transformations in metallic alloys.Keywords
This publication has 7 references indexed in Scilit:
- Experimental evidence for granular superconductivity in Y-Ba-Cu-O at 100 to 160 KPhysical Review Letters, 1987
- Superconductivity at 155 KPhysical Review Letters, 1987
- Phase diagram and superconductivity in the Y-Ba-Cu-O systemApplied Physics Letters, 1987
- Observation of the Reverse ac Josephson Effect in Y-Ba-Cu-O at 240 KPhysical Review Letters, 1987
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987
- Possible highT c superconductivity in the Ba?La?Cu?O systemZeitschrift für Physik B Condensed Matter, 1986
- The growth of γ′ precipitates in nickel-base superalloysActa Metallurgica, 1983