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VOLUME 36 (1982) | ISSUE 11 | PAGE 386
New mechanism for nonlinear sound absorption in metallic glasses
An explanation is offered for the frequency and temperature dependences observed for the nonlinear sound absorption in a metallic glass in experiments reported elsewhere. With increasing sound intensity the resonant absorption gives way to a relaxation absorption. The latter becomes nonlinear when the characteristic strain-induced change in the energy of two-level systems becomes greater than kT.