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Oxygen-Defect Perovskite Structure with Superconducting T<sub>c</sub> above 50 K in La-Ba-Cu-O Compound System
32
Citations
7
References
1987
Year
Materials ScienceSuperconducting MaterialHigh-tc SuperconductivityEngineeringPhysicsHigh-temperature SuperconductivityBa 4CryogenicsApplied PhysicsSuperconductivityCondensed Matter PhysicsQuantum MaterialsNif 4High Tc SuperconductorsOxygen-defect Perovskite StructureLa-ba-cu-o Compound SystemLow-temperature Superconductivity
It is shown experimentally that the La-Ba-Cu-O system has a new high- T c phase La 2 Ba 4 Cu 6 O 14+ y with oxygen-defect perovskite structure, other than the well-known La 2- x Ba x CuO 4 with K 2 NiF 4 structure. The new phase shows a superconducting transition at much higher temperatures ( T c onset>55 K, T c endpoint>42 K) as compared with the K 2 NiF 4 type phase.
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