Temperature dependence of soft mode frequency, dielectric constant and loss tangent of deuterated Rochelle salt crystal

Abstract

By fitting model values for physical quantities for deuterated Rochelle salt crystal in theoretical expressions for soft mode frequency, dielectric constant and loss tangent derived for Rochelle salt in our earlier studies temperature dependences of these quantities have been calculated. Theoretical results have been compared with experimental results reported in literature, which shows a good agreement. Isotope effects on both transition temperatures have been explained successfully.