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Ultrasonic attenuation of longitudinal and shear waves in the normal and superconducting states of niobium

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Abstract

Ultrasonic attenuation measurements of both longitudinal and shear waves in the normal and superconducting states were made on niobium single crystals. Frequencies between 50 and 450 M H z were employed. Independent of the mode, frequency, and crystal studied, a deviation of the attenuation ratio αs/αn from BCS behavior was observed. The dependence of αs/αn on frequency and crystal purity are interpreted in terms of a model which assumes a difference in electron mean-free path due to phonon scattering in the normal and superconducting states.

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Authors and Affiliations

  1. Physics Department, John Carroll University, Cleveland, Ohio

    J. Trivisonno, J. Washick, M. J. Keck & R. Reifenberger

Authors
  1. J. Trivisonno
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  2. J. Washick
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  3. M. J. Keck
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  4. R. Reifenberger
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Additional information

Research sponsored in part by NASA Grant 36-006-003 and by the Air Force Office of Scientific Research, Office of Aerospace Research, United States Air Force, under ASOSR Grant No. 68-1479B.

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Trivisonno, J., Washick, J., Keck, M.J. et al. Ultrasonic attenuation of longitudinal and shear waves in the normal and superconducting states of niobium. J Low Temp Phys 4, 97–109 (1971). https://doi.org/10.1007/BF00628440

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  • DOI: https://doi.org/10.1007/BF00628440

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