Fluxon dynamics by microwave surface resistance measurements in MgB2

Risultato della ricerca: Articlepeer review

Abstract

Field-induced variations of the microwave surface resistance, Rs(H), have been investigated in high-density ceramic MgB2. At low temperatures, several peculiarities of the Rs(H) curves cannot be justified in the framework of models reported in the literature. We suggest that they are ascribable to the unconventional vortex structure in MgB2, related to the presence of two gaps. On the contrary, the results near Tc can be accounted for by the Coffey and Clem model, with fluxons moving in the flux-flow regime, provided that the anisotropy of the upper critical field is taken into due account.
Lingua originaleEnglish
pagine (da-a)171-175
Numero di pagine5
RivistaPHYSICA. C, SUPERCONDUCTIVITY
Volume404
Stato di pubblicazionePublished - 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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