Effect of high electric field on the dc conduction of TeO2-V2O5-MoO3 amorphous bulk material

Souri, Dariush; Elahi, Mohammad

doi:10.1007/s10582-006-0103-9

Cited by 11 publications

(14 citation statements)

References 8 publications

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“…β PF , ε, and ε are the lowering factor, high-frequency dielectric constant, and vacuum dielectric constant, respectively. Therefore, the probability of the thermal hopping P and current I become [4,5,[15][16][17]:…”

Section: Curves Of T Ln(i) Versus E 1/2mentioning

confidence: 99%

“…4, one can determine the lowering factor β PF , high-frequency dielectric constant ε, and refractive index of these glasses using the slope of the linear part of the T ln(I) vs. [4]. Figure 6.…”

Section: Curves Of T Ln(i) Versus E 1/2mentioning

confidence: 99%

“…Electrical-conductive glasses containing transition metal oxides (TMO) [1][2][3][4][5][6][7][8][9] have been widely studied for their electrical properties. The Pool-Frenkel effect, switching phenomena, or negative resistance have been reported from the application of a strong electric field on semiconducting oxide and chalcogenide glasses such as TeO 2 [11], etc.…”

Section: Introductionmentioning

confidence: 99%

“…The Pool-Frenkel effect, switching phenomena, or negative resistance have been reported from the application of a strong electric field on semiconducting oxide and chalcogenide glasses such as TeO 2 [11], etc. In our recent works [1,4], we have studied the low field dc conductivity of 40TeO 2 -(60-)V 2 O 5 − MoO 3 at low and high temper-ature (resulting in the small-polaron hopping conduction mechanism above room temperature). We have also determined the high-frequency dielectric constant of 40TeO 2 (press-melt quenching method), where the blocks were kept at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Using a high-voltage power supply (ORTEC 456, 0-3 kV, USA), current and potential difference between electrodes were measured by a Keithly 610C electrometer (USA) and a Metrix VX102A microvoltmeter (France) respectively, in a cryogenic Janis-CCS 450 (USA) system in the temperature range 298-418 K. The temperature was measured with an accuracy of ±0.5 K. For each sample, the I-V characteristic was measured to verify the ohmic properties of the contacts; in other words, ohmic behavior was ascertained from the linearity of I-V curves at a low electric field. All electrical measurements were carried out by the pulse method to prevent the effect of Joule heating [4,5,11]. Electrode configuration is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Pool-Frenkel effect and high frequency dielectric constant determination of semiconducting P2O5-Li2MoO4-Li2O and P2O5-Na2MoO4-Na2O bulk glasses

2008

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Abstract:The ternary 70P 2 O 5 -10Li 2 MoO 4 -20Li 2 O and 70P 2 O 5 -10Na 2 MoO 4 -20Na 2 O glasses, prepared by the press-melt quenching technique, were studied at temperatures between 298 and 418 K for their high dc electric field properties. For the above purpose, the effect of a strong electric field on the dc conduction of these amorphous bulk samples was investigated using the gap-type electrode configuration. At low electric fields, the current-voltage (I − V ) characteristics have a linear shape, while at high electric fields (> 10 3 V/cm), bulk samples show nonlinear effects (nonohmic conduction). Current-voltage curves show increasing departure from Ohm's law with increasing current density, leading to critical phenomena at a maximum voltage (threshold voltage), known as switching (switch from a low-conduction state to a higher-conduction state at threshold voltage). The Pool-Frenkel high-field effect was observed at electrical fields of about 10 3 -10 4 V/cm; then the lowering factor of the potential barrier, the high frequency dielectric constant, and the refractive index of these glasses were determined. PACS (2008): 72.15.Cz Keywords:Pool-Frenkel effect • strong electric field • amorphous • transition metal oxides • dielectric constant © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Section: Curves Of T Ln(i) Versus E 1/2mentioning

confidence: 99%

Section: Curves Of T Ln(i) Versus E 1/2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Pool-Frenkel effect and high frequency dielectric constant determination of semiconducting P2O5-Li2MoO4-Li2O and P2O5-Na2MoO4-Na2O bulk glasses

2008

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Conductivity features of semiconducting tungsten‐phosphate glasses

2019

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Summary The ac conductivity of 70WO3–30P2O5 glass composition prepared by melt quenching was first studied in the temperature range 25°C to 350°C. The conductivity of the semiconducting glass is investigated with various electrodes (Pt and Ga‐Ag alloy). It is shown that the type of spectrum of cell impedance depends on the chosen electrodes. The influence of the samples geometry on the conduction is established. The influence of gas atmosphere (argon, oxygen, and air of different humidity) on electrical conductivity of tungsten‐phosphate glass on is studied for the first time. A mixed electronic‐ionic conductivity in the 70WO3–30P2O5 glass is found out. The transport numbers are shown as a function of temperature. Ionic and electronic contribution to the conduction is estimated. The electrical conductivity of glass undergoes changes from 8.6 × 10−8 (25°C) to 3.1 × 10−4 S/cm (300°C) in air.

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