Journal of Physical Studies 16(1/2), Article 1704 [15 pages] (2012) DOI: https://doi.org/10.30970/jps.16.1704 DIELECTRIC, PIEZOELECTRIC, ELASTIC AND THERMAL PROPERTIES OF ROCHELLE SALT NaKC4H4O6 · 4H2O R. R. Levitsky1, I. R. Zachek2, A. S. Vdovych1 1Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine 1 Svientsitskii St., Lviv, UA--79011, Ukraine 2 Lviv Polytechnic National University 12 Bandery St., Lviv, UA--79013, Ukraine

Recently proposed four-sublattice model for Rochelle salt is enhanced by taking into account piezoelectric coupling with shear strains $ε_4$, $ε_5$ and $ε_6$. Components of polarization vector and of static dielectric permittivity tensor for both mechanically clamped and free crystals, their piezoelectric characteristics and elastic moduli are derived in the mean field approximation. A proper choice of model parameters provides a good quantitative description of the available experimental data for ordinary and deuterated Rochelle salt for these characteristics.

PACS number(s): 77.84.-s, 64.60.Cn, 77.22.-d, 77.80.-e, 77.80.Bh, 77.65.Bn

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