Impedance and Modulus studies of the solid electrolyte system 20CdI2–80[xAg2O–y(0.7V2O5–0.3B2O3)], where 1≤x/y≤3

Padmasree, K.P.; Kanchan, D. K.; Kulkarni, Ajit R.

doi:10.1016/j.ssi.2005.12.019

Cited by 236 publications

(95 citation statements)

References 23 publications

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“…A continuous increase in the M  dispersion with the increase of frequency shows a tendency to saturate at a maximum asymptotic value for every SM T . The tendency of saturation supports the suggestion that the short range mobility of charge carriers is a conduction process [30]. These interpretations may possibly be related to a lack of restoring force leading the mobility of charge carriers under the action of an induced electric field.…”

Section: Electric Modulus Analysissupporting

confidence: 82%

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

2015

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Abstract:The electrical properties of Ni 0.27 Cu 0.10 Zn 0.63 Fe 2 O 4 (NCZF) prepared from auto combustion synthesis of ferrite powders have been studied by impedance and modulus spectroscopy. We studied frequency and temperature dependencies of impedance and electric modulus of NCZF in a wide frequency range (20 Hz-5 MHz) at different measuring temperatures SM T (30-225 ℃). The complex impedance spectra clearly showed both grain and grain boundary effects on the electrical properties. The observed impedance spectra indicated that the magnitude of grain boundary resistance gb R becomes more prominent compared to grain resistance b R at room temperature, and with the increase in SM T , gb R decreases faster than the intrinsic b R . The frequency response of the imaginary part of impedance showed relaxation behavior at every SM T , and the relaxation frequency variation with SM T appeared to be of Arrhenius nature and the activation energy has been estimated to be 0.37 eV. A complex modulus spectrum was used to understand the mechanism of the electrical transport process, which indicated that a non-Debye type of conductivity relaxation characterizes this material.

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Section: Electric Modulus Analysissupporting

confidence: 82%

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

2015

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“…where f 0 and  0 is a pre-exponential factor, E a is the activation energy; k is the Boltzmann constant; and T the absolute temperature [29]. The activation energy calculated from the modulus spectrum (0.20 eV) is also comparable to the value MSA obtained from the conductivity (0.18 eV) (Figure 3).…”

Section: Resultssupporting

confidence: 69%

Temperature Dependence of the Magnetic and Electric Properties of Ca2Fe2O5

Silva¹,

Sombra²

2011

MSA

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“…For frequencies above maximum value, the carriers seem to be confined to potential well, thus becoming mobile over a short distance [50]. The temperature dependence of the frequency at maximum M 00 is represented by the equation [51]:…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Dielectric and nano-scale free volume properties of polyaniline/polyvinyl alcohol nanocomposites

El‐Gamal

Ismail

El-Mallawany

2015

J Mater Sci: Mater Electron

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Polyaniline (PANI)/polyvinyl alcohol (PVA) nanocomposites has been prepared. Scanning electron microscopy, SEM of pure PVA and PANI/PVA nanocomposite films to monitor the morphology and dispersion of PANI on the surface of the PVA films. Positron annihilation lifetime measurements were carried out, in the air, at room temperature with a conventional fast-fast coincidence spectrometer. Dielectric permittivity e 0 , dielectric loss e 00 and AC conductivity r ac of PANI/PVA nanocomposites has been achieved in the range of frequencies 40 Hz-5 MHz and temperature range of 293-353 K. It was found that; O-ps lifetime, s 3 , its intensity, I 3 and relative fractional free volume, F r increase as the PANI content increases. The dielectric permitivity e 0 and loss e 00 increase with increasing the PANI content and decreases as the frequency increases. The values of the frequency exponent for the correlated barrier hopping s and the binding energy of the charge carriers W m for the investigated nanocomposites decrease with increasing PANI content. Finally, the dielectric permittivity e 0 was found to be directly proportional to the relative fractional free volume, F r .

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Impedance and Modulus studies of the solid electrolyte system 20CdI2–80[xAg2O–y(0.7V2O5–0.3B2O3)], where 1≤x/y≤3

Cited by 236 publications

References 23 publications

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Temperature Dependence of the Magnetic and Electric Properties of Ca<sub>2</sub>Fe<sub>2</sub>O<sub>5</sub>

Dielectric and nano-scale free volume properties of polyaniline/polyvinyl alcohol nanocomposites

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Impedance and Modulus studies of the solid electrolyte system 20CdI2–80[xAg2O–y(0.7V2O5–0.3B2O3)], where 1≤x/y≤3

Cited by 236 publications

References 23 publications

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Complex impedance and electric modulus studies of magnetic ceramic Ni0.27Cu0.10Zn0.63Fe2O4

Temperature Dependence of the Magnetic and Electric Properties of Ca&lt;sub&gt;2&lt;/sub&gt;Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;

Dielectric and nano-scale free volume properties of polyaniline/polyvinyl alcohol nanocomposites

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Temperature Dependence of the Magnetic and Electric Properties of Ca<sub>2</sub>Fe<sub>2</sub>O<sub>5</sub>