Japanese Journal of Applied Physics · 1987 · 39 citations · 3 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsCrystal LatticeCrystal SystemsCrystallographyPerovskite MaterialsSuperconducting MaterialsX-ray CrystallographyCuprate SuperconductorsHigh-temperature SuperconductivityHigh-temperature SuperconductorsMicroscopic CharacterizationPerovskite Crystal StructurePerovskite OxidesSuperconducting CeramicsSuperconducting Properties
High T c superconductor in the system Y-Ba-Cu-O was obtained as a single phase. Its composition was determined to be YBa 2 Cu 3 O y . The compound is practically stoichiometric in regard to the Y-Ba-Cu ratio, the homogeneity range regarding the Y/Ba ratio, if any, being very small. The lattice image of the compound obtained by electron microscopy showed clearly that 3- c structure comes from the ordering of Y and Ba ions located in the A -site of perovskite-related structure.
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