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RESEARCH PRODUCT
Critical-state effects on microwave losses in type-II superconductors
E. Di GennaroA. Agliolo GallittoM. Li VigniMarco Bonurasubject
circuit modelSuperconductivityMaterials scienceCondensed matter physicsCondensed Matter - SuperconductivityVortex flowNiobiumFOS: Physical scienceschemistry.chemical_elementHigh temperature superconductorsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldVortexSuperconductivity (cond-mat.supr-con)chemistryCondensed Matter::SuperconductivityType-II superconductorMicrowaveSheet resistancedescription
We discuss the microwave energy losses in superconductors in the critical state. The field-induced variations of the surface resistance are determined, in the framework of the Coffey and Clem model, by taking into account the distribution of the vortex magnetic field inside the sample. It is shown that the effects of the critical state cannot generally be disregarded to account for the experimental data. Results obtained in bulk niobium at low temperatures are quantitatively justified.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-03-24 | The European Physical Journal B - Condensed Matter and Complex Systems |