The Attenuation of Sound, ql > 1, in Niobium at Low Flux Densities

  • R. E. Jump
  • C. E. Gough


In this paper we report some measurements of the attenuation of longitudinal and transverse sound waves in the mixed state of niobium at high frequencies where ql >1 in both the normal and superconducting states. We have concentrated on the behavior at relatively low fields, well below H c2 , where, as a first approximation, we can consider two independent contributions to the attenuation, one arising from the excitations bound to the flux lines and the other from the BCS-like unbound excitations which are scattered by the flux lines.


Longitudinal Wave Free Path Mixed State Superconducting State Attractive Interaction 
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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • R. E. Jump
    • 1
  • C. E. Gough
    • 1
  1. 1.Department of PhysicsUniversity of BirminghamBirminghamEngland

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