12-05U

# 12-05U

By - Posted on 22 August 2012

UDC:
532, 533, 533.9:530.182, 536.75, 536-12.01.
PACS:
05.60.+w, 05.70.Ln, 05.20.Dd, 52.25.Dg, 52.25.Fi

Relaxation dynamics of Rochelle salt. Taking into account of piezoelectric coupling

I.R. Zachek
R.R. Levitsky

Within the modified four-sublattice model by taking into account piezoelectric coupling with shear strains  $\varepsilon_4$, $\varepsilon_5$ and $\varepsilon_6$, relaxation phenomena in Rochelle salt are studying by D.N.Zubarev  nonequilibrium statistical operator method. Components of dynamic dielectric permittivity tensor for both mechanically clamped and free crystals are derived in the mean field approximation. At the proper choice of model parameters proposed theory provides a good quantitative description of the available experimental data for temperature and frequency dependencies for longitudinal dielectric permittivity for ordinary and deuterated Rochelle salt crystals.

Year:
2012
Pages:
43