March 31, 2023
Dariush Souri

Dariush Souri

Academic rank: Professor
Education: Ph.D in فیزیک
Faculty: science


Title Negative-Resistance Behavior of Bulk Ag2O-TeO2-V2O5 Oxide Glasses
Type Article
Journal Indian Journal of Physics
Researchers Dariush Souri


The bulk 3-component oxide glasses with different silver oxide contents of x= 0, 10, 20, 30, 40 and 50 mol% were prepared using the standard press-melt quenching method. The effect of the high dc-electric field on the dc conductivity of the mentioned glasses was investigated using the gap type electrode configuration. At the regime of low dc-electric fields, the conduction of these samples was ohmic, whereas at high electric fields regime, present bulk samples show nonlinear behavior (i.e. non-ohmic conduction). The current-voltage characteristics shows increasing deviation from Ohm’s law with increasing current density, implying on the non-ohmic behavior in close coincidence with Pool-Frenkel effect (PFE) which occur at electrical fields nearly above (V/cm); so, samples show the switching phenomena at a threshold voltage (Vth) from resistive state to conductive state. Based upon PFE, the lowering factor of potential barrier (βPF) was determined for the understudied samples. Also, results show that generally the threshold voltage in which switching phenomenon occurs, increase by increasing the electrode distance and decrease by increasing of the sample temperature; but, Vth shows two distinct regions of 0≤x≤20 and 20