Abstract
We have measured the surface-acoustic-wave velocities in Ni/V superlattices using both Brillouin scattering and surface-acoustic-wave techniques; the results are in good quantitative agreement. These results confirm earlier reports of phonon-velocity softening in bcc/fcc superlattices and prove that this is a general phenomenon, not a consequence of the measurement method. In addition, we describe in detail the ultrasonic measurement technique which allowed measurements to be performed in thin films.
- Received 7 October 1985
DOI:https://doi.org/10.1103/PhysRevB.33.3696
©1986 American Physical Society