• DocumentCode
    1654491
  • Title

    Sound propagation in disordered metals at low temperatures

  • Author

    Coppersmith, S.N.

  • Author_Institution
    AT&T Bell Lab., Murray Hill, NJ, USA
  • fYear
    1992
  • Firstpage
    905
  • Abstract
    The acoustic properties of disordered materials below 1 K differ from those of perfect crystals because of the presence of two-level systems (TLSs) which contribute to ultrasonic attenuation. Conduction electrons cause the dynamics of TLSs in metals to be fundamentally different from that of TLSs in insulators. The author discusses how the interaction between TLSs and conduction electrons affects the dynamics of the TLSs in metallic glasses and in turn the acoustic properties of these materials. The theoretical calculations are compared to measurements of the sound attenuation and velocity in Pd0.775Si0.165Cu0.06 and Pd30Zr70
  • Keywords
    copper alloys; metallic glasses; palladium alloys; silicon alloys; ultrasonic absorption; ultrasonic propagation; ultrasonic relaxation; ultrasonic velocity; zirconium alloys; Pd0.775Si0.165Cu0.06; Pd30Zr70; acoustic properties; conduction electrons; disordered metals; low temperatures; metallic glasses; relaxational attenuation; sound propagation; sound velocity; tunnelling excitations; two-level systems; ultrasonic attenuation; Acoustic materials; Acoustic propagation; Attenuation; Conducting materials; Crystalline materials; Crystals; Electrons; Insulation; Metal-insulator structures; Temperature;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
  • Conference_Location
    Tucson, AZ
  • Print_ISBN
    0-7803-0562-0
  • Type

    conf

  • DOI
    10.1109/ULTSYM.1992.275841
  • Filename
    275841
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1654491