AC conductivity, electric modulus analysis of KLi(H 2 PO 4 ) 2 compound

Rhimi, T.; Toumi, Mohamed; Khirouni, K.; Guermazi, S.

doi:10.1016/j.jallcom.2017.04.282

Cited by 29 publications

(6 citation statements)

References 41 publications

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“…Furthermore, the broadening of these OH features reflects the high conductivity of materials . In our case, this feature is in agreement with direct measurements in LDP and KLDP and is confirmed by the increase of widening of these bands at higher temperature.…”

Section: Raman Data and Lines Assignmentsupporting

confidence: 92%

Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment

Dekhili

Kauffmann

Aroui

et al. 2018

J Raman Spectroscopy

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We report and analyze Raman spectra recorded on crystals of LiH 2 PO 4 (LDP) and KLi(H 2 PO 4 ) 2 (KLDP). We provide a new and complete assignment of Raman lines in both crystals from their behavior as function of temperature. Among internal vibrations, we discern the modes within PO 4 tetrahedra, the modes related to Li-O bonds, and those due to the O-H vibrations. In the wavenumber range between 300 and 600 cm −1 , the lines associated with O-P-O or Li-O show different temperature dependencies. The bands of PO 4 are red-shifted with increasing temperature according to thermal dilatation, whereas the positions related to Li-O are temperature independent.

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Section: Raman Data and Lines Assignmentsupporting

confidence: 92%

Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment

Dekhili

Kauffmann

Aroui

et al. 2018

J Raman Spectroscopy

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“…The maximum appears when the hopping frequency of localised electrons is approximately equal to the frequency of the applied electric field. The average position of the maximum regularly shifts to higher frequencies with increasing pressure, which demonstrates the presence of a pressure-dependent electrical relaxation phenomenon 24 . Furthermore, the asymmetric broadening of the maxima with increasing pressure suggests a spread of relaxation time in the SnO 2 nanoparticles 25 .…”

Section: Resultsmentioning

confidence: 85%

Effects of high pressure on the electrical resistivity and dielectric properties of nanocrystalline SnO 2

Shen

Wang

et al. 2018

Sci Rep

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The electrical transport and structural properties of tin oxide nanoparticles under compression have been studied by in situ impedance measurements and synchrotron X-ray diffraction (XRD) up to 27.9 GPa. It was found that the conduction of SnO2 can be improved significantly with compression. Abnormal variations in resistivity, relaxation frequency, and relative permittivity were observed at approximately 12.3 and 25.0 GPa, which can be attributed to pressure-induced tetragonal- orthorhombic-cubic structural transitions. The dielectric properties of the SnO2 nanoparticles were found to be a function of pressure, and the dielectric response was dependent on frequency and pressure. The dielectric constant and loss tangent decreased with increasing frequency. Relaxation-type dielectric behaviour dominated at low frequencies. Whereas, modulus spectra indicated that charge carrier short-range motion dominated at high frequencies.

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“…This plot reveals two change of slope at 480 K and 540 K. The calculated activation energies from the linear fit of the data points are found to be 0.71, 1.19 and 2.156 eV in the regions (I), (II) and (III), respectively. It was detectable that the values of activation energies deduced from relaxation time in the regions (I) and (II) are near to the values estimated from conductance spectrum, which indicates that transport property is owing to hopping mechanism [40]. Besides, the activation energy of the relaxation process (region III) is higher than that of the conduction mechanism, suggesting that the relaxation process does not govern the conduction mechanism [41].…”

Section: Impedance Measurementmentioning

confidence: 80%

Structural and Electrical Properties of Sprayed In2S3 Films on ITO/Glass Substrate

Koaib

Bouguila

Kraini

et al. 2021

Preprint

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In2S3 thin films were grown on indium tin oxide (ITO) glass substrate by chemical spray pyrolysis technique at 360°C. The structural analysis of the deposited films shows a combination of tetragonal and cubic structures. The average crystallite size is about 25 nm. The electrical properties of In2S3 thin films have been investigated in a wide frequency (40Hz-100MHz) and temperature (400 K-660 K) ranges.We find that the electrical conductance of the In2S3 thin films is frequency and temperature dependent. The dc conductance shows a semi-conductor behavior for In2S3 films over the explored range of temperature and it follows the Arrhenius law with different activation energies. The variation of ac conductance and the frequency exponent `s’ are explained by the correlated barrier hopping (CBH) model. The Nyquist plots of impedance exhibit semicircle arcs and an electrical equivalent circuit has been suggested to interpret the impedance results.

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AC conductivity, electric modulus analysis of KLi(H 2 PO 4 ) 2 compound

Cited by 29 publications

References 41 publications

Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment

Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment

Effects of high pressure on the electrical resistivity and dielectric properties of nanocrystalline SnO 2

Structural and Electrical Properties of Sprayed In2S3 Films on ITO/Glass Substrate

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AC conductivity, electric modulus analysis of KLi(H 2 PO 4 ) 2 compound

Cited by 29 publications

References 41 publications

Raman spectra in LiH2PO4 and KLi(H2PO4)2: Mode assignment

Raman spectra in LiH2PO4 and KLi(H2PO4)2: Mode assignment

Effects of high pressure on the electrical resistivity and dielectric properties of nanocrystalline SnO 2

Structural and Electrical Properties of Sprayed In2S3 Films on ITO/Glass Substrate

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Product

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Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment

Raman spectra in LiH₂PO₄ and KLi(H₂PO₄)₂: Mode assignment