Journal of the Physical Society of Japan · 1994 · 70 citations · 9 references
Superconducting MaterialEngineeringBismuth-based SuperconductorsThermal DiffusivityThermal Diffusivity αThermal ConductivitySuperconductivityQuantum MaterialsBi-2223 Oxide SuperconductorThermodynamicsThermal ConductionLow-temperature SuperconductivityMaterials ScienceHigh-tc SuperconductivityPhysicsBi-2223 Ceramic SuperconductorsConductivity AppliedConductivity κHigh-temperature SuperconductivityApplied PhysicsCondensed Matter PhysicsThermal EngineeringQuantum SuperconductivityThermal PropertyThermal Properties
A method to measure the thermal diffusivity α and the conductivity κ under an identical experimental setup has been developed and α and κ of Bi-2223 oxide superconductor have been measured quasi-simultaneously. The results are analyzed on the basis of the BRT and Tewordt-Wölkhausen theory. The simultaneous measurement makes it possible to estimate the specific heat C and the Debye temperature Θ D , as well as to separate the electron and phonon contributions to the diffusivity. The simultaneous measurement also provides a useful check on the reliability and the consistency of the analyses.
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