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Characterization of the High T<sub>c</sub> Superconductor (Ba<sub>0.7</sub>Y<sub>0.3</sub>)CuO<sub>3-δ</sub>
42
Citations
3
References
1987
Year
Materials ScienceCrystal StructureSuperconducting MaterialPartial Phase DiagramEngineeringHigh-tc SuperconductivityNovel SuperconductorsPhysicsHigh-temperature SuperconductivityApplied PhysicsQuantum MaterialsCondensed Matter PhysicsSuperconductivityHigh Tc SuperconductorsSuperconducting DevicesQuantum SuperconductivitySingle-phased SampleLow-temperature Superconductivity
By establishing a partial phase diagram of the Ba-Y-Cu-O system, we synthesized a single-phased sample with T c above 90 K. The crystal structure was determined to be an orthorhombic derivative of the perovskite. It was also found that there exist several other phases competing with the high T c phase. Among them a tetragonal phase and another orthorhombic phase were obtained in a single-phased state, the former being non-superconducting above 1.3 K, while the latter superconducting below 60 K. The effects of composition and sintering conditions on the physical properties of these phases are briefly reported.
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