Japanese Journal of Applied Physics · 1987 · 64 citations · 7 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsSolid State PhysicsSpectroscopyMagnetic OxidesMagnetic SusceptibilityPhase TransitionsStrongly Correlated Electron SystemsSuperconducting MaterialsComplex Magnetic SusceptibilityComplex SusceptibilityCuprate SuperconductorsHigh-temperature SuperconductorsSuperconducting GapSuperconducting Phase TransitionsSuperconducting Properties
The superconducting transition of YBa 2 Cu 3 O 6.86 has been studied in terms of complex susceptibility. It is found that the transition has two phases. One is insensitive to the change in the amplitude, h 0 (5-1000 mOe), of the external ac field. The other is very sensitive to h 0 , where the transition width is appreciably broadened as h 0 increases. No frequency dependence is found below 320 Hz. These behaviors are qualitatively common to the other oxide superconductors, La 1.9 Sr 0.1 CuO 4- x and ErBa 2 Cu 3 O 6+ x . Discussion is made in the framework of the phenomenological weak-link loop model.
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Filamentary Structure in Superconductors
E. Maxwell, Myron Strongin · Physical Review Letters · 1963 · 142 citations