DC conductivity and hopping mechanism in V2O5–B2O3–BaO glasses

El‐Desoky, M. M.

doi:10.1002/pssa.200305944

Cited by 45 publications

(29 citation statements)

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“…It is observed from the figure linear temperature dependence up to a temperature Â D /2 (Â D Debye temperature). Such behavior is typical for the hopping of electrons or polarons between mixed valence states [18,4,[19][20][21][22]. So the experimental conductivity data above Â D /2 were fitted with SPH model proposed by Mott [30,31].…”

Section: Conductivity and Activation Energymentioning

confidence: 99%

Correlation between nanostructural and electrical properties of barium titanate-based glass–ceramic nano-composites

Al-Assiri

El‐Desoky

2011

Journal of Alloys and Compounds

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Section: Conductivity and Activation Energymentioning

confidence: 99%

Correlation between nanostructural and electrical properties of barium titanate-based glass–ceramic nano-composites

Al-Assiri

El‐Desoky

2011

Journal of Alloys and Compounds

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“…A strong electron-phonon interaction is considered to be responsible for the formation of small polarons [11] and the polaron hopping conduction model has been used to illustrate the semiconducting behavior. The semiconducting properties of transition metal oxide (TMO) arise from the presence of different valence states of transition metal ions [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Transport properties of Ba-doped BiFeO3 multiferroic nanoparticles

El‐Desoky

Mostafa

Ayoub

et al. 2015

J Mater Sci: Mater Electron

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Multiferroic nanoparticles of Bi 1-x Ba x FeO 3 (BiBaFeO 3 ); (x = 0.10, 0.15, 0.20 and 0.25 mol%) samples were prepared using conventional solid-state method. The nanostructural and transport properties of the prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and electrical conductivity. XRD patterns show the formation of BiBaFeO 3 with single-phase rhombohedral-hexagonal structure. The particles sizes were found to be in the range 20-33 nm. SEM micrograph revealed the nanostructure consisting of small, randomly oriented and non-uniform grains. Dc conductivity shows that all samples are semiconductor and the maximum was found at x = 0.15 mol%. This increase of the conductivity can be attributed to the decrease in grain boundary scattering due to the reduction in crystallite size. The calculated activation energy for the multiferroic nanoparticles was found to be 0.413-0.929 eV. The conduction was confirmed to obey non-adiabatic small polaron hopping (SPH). The electron-phonon interaction coefficient (c p ) was calculated and found to be in the range of (12.79-27.21). The hopping carrier mobility varied from 1.85 9 10 -7 cm 2 V -1 s -1 to 8.01 9 10 -13 cm 2 V -1 s -1 at 418 K. The conductivity was primarily determined by hopping carrier mobility.

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“…13) shows linear -temperature -dependence up to critical temperature Â D /2 and then the slope changes with deviation from linearity and the activation energy is temperature dependent. Such a behavior was found in SrTiO 3 -V 2 O 3 -PbO 2 [26] and V 2 O 5 -BaO-B 2 O 3 glasses [27]. This phenomenon is attributed to the change of conduction mode from SPH to VRH with decrease in temperature [28,29].…”

Section: Electrical Conductivitymentioning

confidence: 90%

“…12 we notice that the temperature dependence of dc conductivity deviated from the linearity at temperature less than 350 K (above which the SPH law is valid). Therefore, we attempted to apply the variable-range hopping (VRH) models [28,49] to the present glass as reported for V 2 O 5 -NiO-TeO 2 [58] and V 2 O 5 -BaO-B 2 O 3 [27] glasses. However, the validity of such a high temperature range is not beyond question.…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…Alternatively, the dc conductivity of transition metal oxide (TMO) glasses has been targeted for extensive studies [18,[26][27][28][29][30][31][32] because of their interesting semiconducting properties as well as for their probable technological applications. The conduction mechanism in these glasses was understood by the small polaron hopping (SPH) model [33][34][35] based on strong electron-lattice interaction.…”

Section: Introductionmentioning

confidence: 99%

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