Polarons in boron doped iron phosphate glasses

Filipič, C.; Moguš‐Milanković, Andrea; Pavić, Luka; Karabulut, Mevlüt; Levstik, A.

doi:10.1016/j.jnoncrysol.2012.07.011

Cited by 2 publications

(2 citation statements)

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“…Such behavior is in agreement with that predicted by the Correlated Barrier Hopping (CBH) model (Elliott, 1987). In other words, the hopping of charge carriers over the potential barrier may be considered as the conduction mechanism for the studied glasses (Ahlawat et al, 2016;Filipic et al, 2012;Pal et al, 2011).…”

Section: Conduction Mechanismsupporting

confidence: 86%

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Gomaa

Elkatlawy

El-Dosokey

2019

International Journal of Structural Glass and Advanced Material

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Samples of calcium borate glasses containing iron ions have been prepared with three different concentrations of both boron and iron oxides. X-ray diffraction spectroscopy was performed and results revealed that samples are in good glassy state, with high homogeneity and short range ordered structure. Electrical conductivity was experimentally measured in the temperature range from 300 to 553 K. Conductivity results have been studied as a function of the static dielectric constant (ε) and the charge carrier's relaxation time (τ). The results were modeled by means of an empirical formula that fits the experimental data as a function of both the static dielectric constant and the electric activation energy ∆Ε; in addition to the exponent factor s. Total measured conductivity modeled using the proposed empirical formula fits neatly the correlated barrier hopping model.

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Section: Conduction Mechanismsupporting

confidence: 86%

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Gomaa

Elkatlawy

El-Dosokey

2019

International Journal of Structural Glass and Advanced Material

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“…The coefficient can also be determined using the relation 14 that connects the reduced polaron radius and the polaron radius (r 0 0 ¼ 2r 0 ). The values of fitting parameters for Pb 5 Cr 3 F 19 , Mn 1 (38.9LiI-1.0AgI-60B 2 O 3 : 0.1MnO), 20 and for A 6 (6B 2 O 3 -34Fe 2 O 3 -60P 2 O 5 Þ, 21 previously determined, are given in Table 1. In the last column, the oscillation period of an electron 1 T osc ¼ 2ð}=ÁWÞ is given if we take ÁW $ W 1 .…”

Section: Resultsmentioning

confidence: 99%

Femtosecond tunneling of polarons in Pb₅Cr₃F₁₉

et al. 2014

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The complex dielectric constant/ac electrical conductivity was investigated as a function of frequency and temperature in Pb 5 Cr 3 F 19. The system undergoes a ferroelectric phase transition at higher temperatures. At lower temperatures the real part of the complex ac electric conductivity was found to follow the universal dielectric response (UDR) σ′ ∝ νs, typical for hopping or tunneling of localized charge carriers. A detailed analysis of the temperature dependence of the UDR parameter s in terms of the theoretical model for tunneling of small polarons revealed that, at low temperatures, this mechanism governs the charge transport in Pb 5 Cr 3 F 19. The value of the inverse attempt frequency τ0 indicates the femtosecond tunneling of polarons in the system similar to the Büttiker–Landauer transversal time.

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Polarons in boron doped iron phosphate glasses

Cited by 2 publications

References 12 publications

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Femtosecond tunneling of polarons in Pb₅Cr₃F₁₉

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Polarons in boron doped iron phosphate glasses

Cited by 2 publications

References 12 publications

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Total Conductivity of Calcium Iron Borate Glasses Using an Empirical Formula

Femtosecond tunneling of polarons in Pb5Cr3F19

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Femtosecond tunneling of polarons in Pb₅Cr₃F₁₉