DC AND AC CONDUCTIVITY MEASUREMENTS OF Se60Te30Ge10 FILMS

Abstract

D.c. σ(0) and a.c conductivity σ(w) and dielectric parameter ( and tan 60 Te 30 Ge 10 glassy thin films which were prepared by thermal evaporation were investigated. Measurements of a.c. conductivity over frequency range (100Hz-100kHz) and temperature range (303-363K) showed that the a.c. conductivity follows the empirical formula  a.c (w)=Aw s , where (s) lies between (1.03-0.60).In the glasses of Se 60 Te 30 Ge 10 thin films the d.c. conductivity along localized states prevails. A.c conductivity is explained by hopping mechanism of charge transfer between two defect centers.

In Situ Synthesis of Polyaniline Based Ceramic Wastes Composites: Dielectric and Electrical Properties

“…6. For both CW and CW/PANI, a slight decrease in capacitance indicates the space region reduction near electrodes surface [39]. Capacitance value from 3.7 pF to 1.6 pF at 1.6 GHz for CW/PANI is due to charge carriers that are comparatively blocked adjacent to electrodes surfaces.…”

Synthesis of a Novel Nanoparticle BaCoO2.6 through Sol‐Gel Method and Elucidation of Its Structure and Electrical Properties

“…In the region I, the ac conductivity (σ ac ) does not follow the conductivity relation and is considered a metallic behavior, also observed in the Seebeck measurement (Figure 7(a)). In the region II (mid-temperature region), the conductivity differs exponentially with the temperature that is no longer linear wherein the change in slope (from positive to negative) may be attributed to the facts such as a mixed type of conduction inducted by thermally activated charge carriers and the oxygen vacancies in the nanoproduct [24][25][26][27]. The presence of oxygen vacancies and transfer of charge carriers concerning metal-insulator connects the sample probe into the analysis of critical temperature of hightemperature superconducting cuprates, usage as catalysts for hydrogen evolution reaction in support of green energy, as the secondary power supply in integrated circuits, and current overload protection devices [28][29][30].…”

Towards the development of stable and efficient novel waste ceramics composites

“…The charge carries accumulates at the ceramic/PANI interface which results in the increase of interfacial polarization [21]. The intense conductivity of the composites may be due to the addition of conducting polymers [22]. Furthermore, polarons in PANI chains enhances the conductivity of the composites.…”

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