eng Oriental Scientific Publishing Company Material Science Research India 0973-3469 2011-05-24 8 1 137 141 2523 article Investigation of Deuteration Effect on Sound Attenuation in Hydrogen Bonded Ferroelectric Crystals S. C. Deorani 1 P. Singh 1 M. S. Yadav 1 R.R. Autonomous College, Alwar - 301 001, India.

The anomalous ultrasonic attenuation of longitudinal wave propagated in KDP and DKDP have been discussed and calculated near Curie-temperature (Tc) in Para- electric phase in the frequency range 5 to 50 MHz. The attenuation of longitudinal waves is primarily due to a strong interaction with thermally excited phonon in the coupled-soft mode. Temperature and frequency variations of attenuation are discussed. Anharmonicity in the crystal potential is essential to discuss (observe) critical attenuation.

 https://www.materialsciencejournal.org/vol8no1/investigation-of-deuteration-effect-on-sound-attenuation-in-hydrogen-bonded-ferroelectric-crystals/ Attenuation Coupled-soft mode Dyson's equation Fourier transform Green's function Phase transition and isotope effect.