Single crystals of pure and Cd-doped KCl (1000 ppm) were grown by the Czochralski technique. The acoustic attenuation and velocity in pure and Cd-doped KCl for the longitudinal waves along the [100] direction at 12 MHz are measured by single-ended pulse-echo and pulse-echo-overlap methods in the temperature range 173–303 K. The acoustic attenuation is measured in the frequency range 12–228 MHz at room temperature (303 K). The Cd-doped KCl sample showed an increase in attenuation and a decrease in velocity compared to the pure sample. We have also estimated Mason’s nonlinearity constant D along the [100] direction at 303 K from the second-order elastic and third-order elastic constants and furthermore used it to evaluate the ultrasonic attenuation in the frequency range 12–228 MHz. These values are compared with our measured attenuation values.

• Received 25 August 1987

DOI:https://doi.org/10.1103/PhysRevB.37.3101