Impedance, AC conductivity and dielectric behavior Adeninium Trichloromercurate (II)

• The ac conductivity spectra are found to obey the Jonscher's universal power law.
• (CBH) model is the mechanisms predominate in our compound.
• The modulus formalism indicating the presence of a single relaxation peak.

In this work, we report the measurements impedance spectroscopy technique for the organic-inorganic hybrid compound (C5H6N5) HgCl3, 11/2H2O measured in the 209 Hz–5 MHz frequency range from 378 to 428 K. Besides, the Cole–Cole (Z″ versus Z′) plots were well fitted to an equivalent circuit built up by a parallel combination of resistance (R), fractal capacitance (CPE) and capacitance (C). Furthermore, the AC conductivity was investigated as a function of temperature and frequency in the same range. The experiment results indicated that AC conductivity (σac  ) was proportional to σdc+AωSσdc+AωS. The obtained results are discussed in terms of the correlated barrier hopping (CBH) model. An agreement between the experimental and theoretical results suggests that the AC conductivity behavior of Adeninium Trichloromercurate (II) can be successfully explained by CBH model. The contribution of single polaron hopping to AC conductivity in a present alloy was also studied.