Dielectric behavior of LTT and calculation of dipole-dipole interaction energy in LaT

Abstract

The dielectric constant of LTT (LiTIC4H4O6. H2O) showed a clear peak at the Curie point (11.5 K) and a shoulder below the Curie point. Changes in the coercive field are small compared to the increase in the spontaneous polarization with decreasing temperature. This fact suggests that the reversal of domains in LTT is not caused by the thermal nucleation process of two dimensional nuclei. On the other hand a calculation of the dipole-dipole interaction energy in LAT (L1NH4C4H4O6. H2O) based on the structural data indicates that the arrangement of four dipoles in the unit cell which causes the spontaneous polarization along the b-axis has the lowest dipole-dipole interaction energy.