Ultrasonic attenuation in a type II superconducting alloy

B. R. Tittmann

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Abstract

Ultrasonic attenuation measurements have now been obtained on a magnetically reversible type-II superconductor with both a high Ginzburg-Landau parameter (κg > 1) and with BCS coherence length > electronic mean free path. For applied fields close to Hc2, the data appear to agree with dirty-limit (ξ0/l > 1) theory which predicts a linear dependence of α on H. At fields farther from Hc2, α(H) deviates from linearity and appears to fit empirically to a parabolic function of H. At very low fields, H {greater-than or approximate} Hc1, the H- and T-dependence is in apparent agreement with another theory. Physical insight into the behavior in this region could be obtained with a model in which vortices are replaced by cylinders of completely normal material imbedded in a superconducting matrix.

Original languageEnglish (US)
Pages (from-to)1687-1691
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume31
Issue number8
DOIs
StatePublished - Aug 1970

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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