Ultrasonic attenuation in Niobium Oxide(NbO) due to phonon-phonon interaction

Abstract

Ultrasonic attenuation due to phonon-phonon interaction and thermo elastic mechanism have been evaluated in NbO along >110> direction in the temperature range 100-500K. The second and third order elastic constants are also evaluated for the evaluation of ultrasonic attenuation and other associated parameters. The ultrasonic attenuation due to phonon-phonon interaction is predominant over thermo elastic loss in this material. The results are discussed in correlation with thenno elastic properties of NbO.