Broadband dielectric spectroscopic investigation of Melaminium bis (trichloroacetate) dihydrate—a nonlinear optical single crystal

In this report, a detailed study on dielectric and charge transport properties of the nonlinear optical material—melaminium bis (trichloroacetate) dihydrate (MTCA) is given. It is evident that there is no ferroelectric or antiferroelectric polarization in the material. It is expected to have a piezo-electric property, not a ferroelectric as the material is a non-centrosymmetric crystal. The dielectric characteristics of the specimen was carried out in a range of frequencies between 50 Hz and 5 MHz at different temperatures viz 313 K, 333 K, 353 K and 373 K. It is observed that slow down occurs at low temperatures and the hopping mechanism takes place based on localized charge carriers. The results of a complex impedance spectrum indicate that single relaxation processes occur at high frequencies. A detailed report on temperature and frequency dependence of materials’ properties of MTCA is provided in this communication.