Ultrasonic evidence for a structural phase transition at 220 K in
- 1 October 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (10) , 7077-7079
- https://doi.org/10.1103/physrevb.38.7077
Abstract
Ultrasonic study of the superconductor reveals the existence of a shear instability centered at ∼220 K. This instability is manifested by a large step in both the longitudinal and transverse velocities. This step is also accompanied by a peak in the attenuation. The analysis of the results suggests that the instability corresponds to a structural order-disorder transition.
Keywords
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