Ultrasonic Studies of Metallic Glasses

  • H. Araki
  • G. Park
  • A. Hikata
  • C. Elbaum

Abstract

New results on ultrasonic properties of amorphous. PdSiCu are reported. The temperature and amplitude dependence of the ultrasonic attenuation and velocity changes were measured by a pulse echo method1), between 0.3 and 10 K, using transverse waves at 10 to 90 MHz and longitudinal waves at 30 MHz, A typical temperature dependence of the ultrasonic attenuation coefficient a for transverse waves at 25.1 MHz and four different amplitudes is shown in Fig. 1. As is seen from the figure, below 4 K there is a definite negative amplitude dependence. Detailed results of the amplitude dependent part αA at various temperatures are shown in Fig. 2. Measurements carried out at several different frequencies showed that αA increases as the ultrasonic frequency increases2). For longitudinal waves, there is a much smaller negative amplitude dependence of attenuation than for transverse waves.

Keywords

Attenuation Acoustics Verse 

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References

  1. 1.
    The resolution of the equipment is better than 0.004 dB and 10−6 for amplitude and velocity change measurements, respectively.Google Scholar
  2. 2.
    The velocity changes Λv/v were found to be proportional to logT at low temperatures (0,3 ≲ T ≲ 1.0 K) for both modes in agreement with previous observations. In addition, however, amplitude dependence of the slope of Λv/v versus logT for transverse waves was found (the higher the amplitude, the smaller the slope).Google Scholar
  3. 3.
    S. Hunklinger and W. Arnold, Physical Acoustics, Vol. XII, ed, M. P. Mason and R. N. Thurston, Academic Press, N. Y. (1976), p, 155, and references within.Google Scholar
  4. 4.
    Difference of factor 2 from other papers comes from the difference in amplitude and intensity attenuation coefficient,Google Scholar
  5. 5.
    P. Doussineau. P. Legros, A. Levelut and A. Robin, J, Phys, (Paris) Lett, 39, L-265 (1973),Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • H. Araki
    • 1
  • G. Park
    • 1
  • A. Hikata
    • 1
  • C. Elbaum
    • 1
  1. 1.Brown UniversityProvidenceUSA

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