Dielectric and impedance spectral characteristics of bulk ZnIn2Se4

Correlation between ionic radii of metal azodye complexes and electrical conductivity

“…When the frequency is increased, the dipoles cannot rotate sufficiently rapidly, so that their oscillations lag behind those of the field. As the frequency is further raised, the dipole will be completely unable to follow the field and the orientation polarization ceases, so ε r approaching a constant value at high frequencies due to the interfacial polarization only [37]. Fig.…”

“…The increase of ε r with temperature can be attributed to the fact that dipoles in polar materials cannot orient themselves at low temperatures. When the temperature is raised, the orientation of the dipoles is facilitated and thus increases the orientation polarization, and in turn increases ε r [37].…”

“…The decrease of ε i with the increase in frequency can be explained as follow. At relatively low frequency, the ε i value is due to many sources such as ion jump, conduction loss of charge carriers, ion polarization and ion vibration, while at high frequency, the ion vibration is may be the only source of dielectric loss and so, ε i has the minimum value [37]. The behavior of the dielectric constants ε r and ε i was found to be affected by the chemical changes during decomposition in the temperature range 460-600 K. According to Giuntini et al [38], the values of ε i at a certain temperature are given by the relation:…”

“…In order to determine the conduction mechanism for a material, theoretical model has been reported to correlate the conduction mechanism with the behavior of the frequency exponent [7,37,41]. The value of S is the slope of the straight lines obtained from the relation between log ζ ac and log ω.…”

Characteristics of Dielectric Behavior and AC Electrical Conductivity of Bulk Antimony Sulfide (Sb2S3)

“…This suggested that the ac conductivity for bulk Sb 2 S 3 was a thermally activated process with an activation energy ΔE. The value of ΔE for ac conduction was calculated from the Arrhenius relation asfollows [52]:…”