Lattice dynamics, thermal properties

Quasielastic light scattering as a method for controlling the quality factor of piezoelectric crystals

A. A. Anikiev^a, M. F. Umarov^b, A. K. Khodzhibaev<sup>c

a</sup> Bauman Moscow State Technical University, Moscow, Russia
^b Vologda State University, Vologda, Russia
^c Khujand State University, Khujand, Tajikistan

Abstract: Polarization measurements of quasi-elastic light scattering were carried out in representatives of a new family of lanthanide stibnite crystals $R_3$Sb$_5$O$_{12}$ ($R$ = Gd, Pr, Nd, Er). A connection has been established between the degree of depolarization of scattered radiation and imperfections in the structure of new compounds of the cubic symmetry group. The fraction of depolarized radiation is directly related to the acoustic quality factor of the crystals. The law of the inverse exponential relationship between the degree of depolarization of radiation scattered at right angles and the quality factor of piezoresonators based on Pr$_3$Sb$_5$O$_{12}$ and Nb$_3$Sb$_5$O$_{12}$ has been found.

Keywords: polarization, quasi-elastic scattering, quality factor, defects.

DOI: 10.61011/FTT.2024.09.58789.114