Dielectric, impedance, modulus spectroscopy and AC conductivity studies on novel organic ferroelectric diisopropylammonium chloride (dipaCl)

Abstract

Organic molecular ferroelectric diisopropylammonium chloride (dipaCl) was successfully synthesized using diisopropylamine, hydrochloric acid (57%) and methanol solution. Dielectric permittivity, impedance, modulus spectroscopy and conductivity were systematically studied by Capacitance-Conductance (CP-G) measurements in the temperature range of 373-445 K. Dielectric property tests clearly show that the organic molecular ferroelectric dipaCl obeys Curies-Weiss law 1/= (T-T0)/C. The real (Z′) and imaginary (Z′′) parts of the electrical modulus were calculated from the various values of ′ and ′′. It is shown that AC conductivity satisfies the relation σ(ω)∞ωn, where the power exponent n depends on temperature and frequency. From Arrhenius equation, the activation energies Eσand Eh are also calculated which describes the complete conduction mechanism of dipaCl.