Investigation of Deuteration Effect on Sound Attenuation in Hydrogen Bonded Ferroelectric Crystals | Zendy

S. C. Deorani | Zendy; Pawandeep Singh | Zendy; M. S. Yadav | Zendy

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Investigation of Deuteration Effect on Sound Attenuation in Hydrogen Bonded Ferroelectric Crystals

Author(s) -

S. C. Deorani,

Pawandeep Singh,

M. S. Yadav

Publication year - 2011

Publication title -

material science research india

Language(s) - English

Resource type - Journals

eISSN - 2394-0565

pISSN - 0973-3469

DOI - 10.13005/msri/080120

Subject(s) - attenuation , anharmonicity , ferroelectricity , materials science , excited state , acoustic attenuation , soft modes , crystal (programming language) , condensed matter physics , phonon , phase (matter) , longitudinal mode , optics , atomic physics , physics , optoelectronics , dielectric , wavelength , quantum mechanics , computer science , programming language

The anomalous ultrasonic attenuation of longitudinal wave propagated in KDP and DKDP have been discussed and calculated near Curie-temperature (Tc) in Paraelectric 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.

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