Ultrasonic study of mechanically alloyed Co40Sn60
- 23 February 1987
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 50 (8), 478-479
- https://doi.org/10.1063/1.98179
Abstract
Ultrasonic velocity changes of mechanically alloyed Co40Sn60 are investigated as a function of temperature at low temperatures. It is found that the velocity increases logarithmically with temperature below ∼1 K, indicating the existence of features characteristic of the glassy state. With the two level tunneling system (TLS) model developed for amorphous materials, factors nM2 and K̃ are determined, where n is the density of states of TLS, M and K̃ are TLS coupling constants for phonons and electrons, respectively.Keywords
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