Japanese Journal of Applied Physics · 1988 · 30 citations · 5 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsCrystal StructureSolid State PhysicsCritical PhenomenaCrystallographyPhase TransitionsSolid-state Phase TransitionsStrongly Correlated Electron SystemsSuperconducting MaterialsCritical TemperatureCrystalline StructureCuprate SuperconductorsHigh-temperature SuperconductorsQuenched PhasesSuperconducting Critical TemperatureSuperconducting Phase TransitionsX-ray Diffraction Analysis
The BiSrCaCu 2 O x specimens have been quenched from various elevated temperatures (200°C ∼860°C) to liquid nitrogen. The X-ray diffraction study revealed that the crystalline structure of specimens is essentially tetragonal. We found that the lower T c as well as the higher T c vary remarkably but differently as a function of a quenching temperature T q . We present evidence that the opposite T c variation observed between 400°C and 700°C cannot be attributed to a microscopic interaction between two phases but might be inherent.
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Sputter Deposition of BiSrCaCuO Thin Films
Masao Fukutomi, Junichi Machida, Yoshiaki Tanaka et al. · Japanese Journal of Applied Physics · 1988 · 692 citations