Temperature and Frequency Dependence of Longitudinal Sound in HCP 4He

  • I. D. Calder
  • J. P. Franck


We present here data on the temperature- and frequency-dependence of the longitudinal sound velocity of single crystals of hcp 4He. The data show the following: the longitudinal sound velocity has very large dispersion at all temperatures from the melting point on down; the anomalous behavior is not always present; in crystals that show an anomaly (the majority of those grown), the anomaly moves to lower temperatures with increasing frequency.


Phase Velocity Sound Velocity Anomalous Behavior Orientation Dependence Anomalous Dispersion 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. (1).
    J. E. May, Jr., IRE Nat. Conv. Ree. 6, Pt. 2, 134 (1958).Google Scholar
  2. (2).
    E. P. Papadakis, J. Appl. Phys. 35, 1474 (1964); J. Acoust. Soc. Amer. 42, 1045 (1967).Google Scholar
  3. (3).
    D. H. Chung, D. J. Silversmith and B. B. Chick, Rev. Sci. Instr. 40, 718 (1969).ADSCrossRefGoogle Scholar
  4. (4).
    J. P. van Nest, T. S. Hutchinson and D. H. Rogers, Can. J. Physics 47, 1797 (1969).ADSCrossRefGoogle Scholar
  5. (5).
    H. J. McScimin, J. Acoust. Soc. Amer. 33, 12 (1961).ADSCrossRefGoogle Scholar
  6. (6).
    L. G. Merkulov and V. A. Tret’yakov, Soviet Physics Acoustics 20, 358 (1975).Google Scholar
  7. (7).
    E. P. Papadakis, J. Acoust. Soc. Amer. 40, 863 (1966).ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • I. D. Calder
    • 1
  • J. P. Franck
    • 1
  1. 1.Department of PhysicsUniversity of AlbertaEdmontonCanada

Personalised recommendations