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
BONURA, M., DI GENNARO, E., AGLIOLO GALLITTO, A., LI VIGNI, M. (2006). Critical-state effects on microwave losses in type-II superconductors. THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS, 52(4), 459-463 [10.1140/epjb/e2006-00320-9].
Critical-state effects on microwave losses in type-II superconductors
BONURA, Marco;DI GENNARO, Emiliano;AGLIOLO GALLITTO, Aurelio;LI VIGNI, Maria
2006-01-01
Abstract
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
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