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Low-Temperature Anomalies in Pure Niobium Studied Ultrasonically

  • J. R. Leibowitz
  • E. Alexander
  • G. Blessing
  • T. Francavillat

Abstract

Elsewhere in these conference proceedings we report results of magneto-acoustic studies in niobium. In the present paper we discuss some curious magneticfield-independent effects which we have encountered in the normal and superconducting states of high-purity Nb. While we believe that some of these are connected, it will prove convenient to introduce them separately under the following “labels”: (I) The effect of high ql on the reported deviation from BCS predictions1 for case I absorption in superconducting niobium; (II) the question of electromagnetic coupling between transverse phonons and excited quasiparticles (for H = 0), examined in the transverse wave acoustic attenuation near Tc; (III) the discovery of a low-temperature maximum in the normal-state electronic attenuation in high-purity niobium.

Keywords

Ultrasonic Attenuation Electromagnetic Coupling Transverse Phonon Attenuation Ratio Pure Niobium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • J. R. Leibowitz
    • 1
  • E. Alexander
    • 2
  • G. Blessing
    • 3
  • T. Francavillat
    • 3
  1. 1.Catholic University of AmericaUSA
  2. 2.University of MarylandCollege ParkUSA
  3. 3.Catholic University of AmericaUSA

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