The electrical modulus, conductivity and dielectric properties of Mn3TeO6 multiferroic compound

Highlights: • Mn₃TeO₆ compound were prepared by solid state reaction method. • Effect of temperature (Range: 303 K–393 K) on dielectric measurements and electric properties has been discussed. • The relative permittivity and ac conductivity of the studied compound has been increased with temperature. • The experimental data was fitted by cole cole model and show non Debye type of relaxation mechanism. • Conductivity parameter with s 1 suggest CBH (Correlated Barrier Hopping) conduction mechanism. -- Abstract: In this communication, the complex oxide Mn₃TeO₆ (MTO) compound was synthesized by solid-state reaction (SSR) method with high processing temperature. Mn₃TeO₆ compound was characterized by using the XRD technique at room temperature. The material was found in single phasic nature, and compositional purity was confirmed by using EDAX analysis. FE-SEM analysis was carried out to study the morphological properties of the prepared Mn₃TeO₆ (MTO) compound. Frequency-dependent electrical properties have been studied by using Complex Impedance Spectroscopy (CIS) characterization technique. Complex permittivity analysis (Dielectric constant ε′ and Dielectric loss ε'') of the Mn₃TeO₆ (MTO) compound has been studied. The dielectric constant of the compound is found to increase with temperature (303 K–393 K). Dielectric behavior has been successfully explained by theoretically fitting the cole cole model and comparing results with experimental values. Cole cole plot from permittivity analysis indicates non-Debye type dielectric relaxation mechanism present in the studied compound. This has been discussed in detail on the basis of complex modulus study for the Mn₃TeO₆ compound. Electrical conductivity analysis has been carried out by theoretically fitting of observed data with power law. The conductivity parameter with s < 1 suggests CBH (Correlated Barrier Hopping) mechanism responsible for conduction. As increase in temperature, conductivity was found to be increased. Fitting parameters obtained from the theoretical aspect have been discussed in the present context.