Synthesis, electrical properties, and conduction mechanism of [N(CH3)4]2PdCl4 compound

Abstract

[N (CH3)4]2 PdCl4hybrid compound was synthesized and studied by X-ray powder diffraction patterns, differential scanning calorimetry (DSC), and impedance spectroscopy. It is crystallized at room temperature in the tetragonal system with P4/mmm space group and the refined unit cell parameters are a = b = 8.831 Å, c = 11.415 Å. Four phase transitions at T1 = 348 K, T2 = 398 K, T3 = 462 K and T4 = 472 K were detected by DSC measurements and confirmed by the variation of fp, σg and σdc as a function of temperature. The equivalent circuit was attributed based on the Z-View software, and the (AC) electrical conduction in [N(CH3)4]2PdCl4 was determined by two processes based on Elliot’s theory: non-overlapping small polaron tunneling model (NSPT) in phase I and IV and the correlated barrier hopping model (CBH) in phase II and III.