Critical-state effects on microwave losses in type-II superconductors

M. Bonura, E. Di Gennaro, A. Agliolo Gallitto and M. Li Vigni ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2006, vol. 52, issue 4, 459-463

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. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Keywords: 74.25.Ha Magnetic properties; 74.25.Nf Response to electromagnetic fields (nuclear magnetic resonance; surface impedance; etc.); 74.60.Ge Flux pinning; flux creep; and flux-line lattice dynamics (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1140/epjb/e2006-00320-9

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