Investigation on relaxation and conduction mechanism in Pb0.75K0.5Nb2O6 new ferroelectric ceramic

Belboukhari, A.; Choukri, E.; Gagou, Y.; Elmoznine, R.; Abdelmoula, N.; Neqali, A.; Marssi, M. El; Khemakhem, H.; Mezzane, D.

doi:10.1016/j.spmi.2014.03.031

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Nyquist and Cole-cole Plot1

Complex Impedance Analysis1

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Cited by 30 publications

(2 citation statements)

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“…The larger semicircles at low frequencies are due to the effect of grain boundaries while smaller semicircles at higher frequencies are due to the effect of bulk grains [48]. The Nyquist plots are semicircular, which supports the semiconducting nature of the sample [49]. Fig.…”

Section: Nyquist and Cole-cole Plotmentioning

confidence: 53%

Effect of La Dopant in Modified Bismuth Ferrite Ceramics

Parida¹

2021

Adv. Mater. Lett.

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Section: Nyquist and Cole-cole Plotmentioning

confidence: 53%

Effect of La Dopant in Modified Bismuth Ferrite Ceramics

Parida¹

2021

Adv. Mater. Lett.

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“…In addition and according to Funke [29], when the n value is equal to 1, it means that the hopping motion involves a translational motion with a sudden hopping and when n is greater than 1, it means that the motion involves localized hopping without the species leaving the neighborhood [30,31]. The change of tendency in slope takes place at a frequency known as hopping frequency of the polarons (x p ), which depends on temperature.…”

Section: Complex Impedance Analysismentioning

confidence: 99%

Diffuse phase transition and impedance spectroscopy analysis of Ba2.15−x Na0.7+x Nb5−x W x O15 (x = 0.25) ferroelectric ceramic

Neqali

Belboukhari²,

Bensaid³

et al. 2016

Appl. Phys. A

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A new rare earth ferroelectric tetragonal tungsten bronze compound with general formula Ba 2.15-xNa 0.7?x Nb 5-x W x O 15 (x = 0.25) was elaborated as ceramic and investigated using X-ray diffraction and dielectric measurements. The results show a tetragonal phase with the space group P4bm. Special emphasis was done to characterize diffuse phase transition (DPT) that occurs close to 472°C. Using dielectric measurements in a frequency range of (10 Hz-1 MHz) and in a temperature range (25-550°C), we have shown that the real part of the permittivity close to DPT is well described by Santos-Eiras phenomenological model. Space charge polarization, relaxation phenomena and free charges conductivity have been analyzed using dielectric, impedance spectroscopy and Nyquist plots showed non-Debye (polydispersive) type relaxation. In paraelectric phase, the Arrhenius activation energies were determined. Frequency dependence of ac conductivity at different temperatures follows the Jonscher's universal law (Jonscher et al. in J Mater Sci 20:4431, 1985).

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Dielectric behavior of manganese titanate in the paraelectric phase

Acharya

Choudhary

2015

Appl. Phys. A

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Investigation on relaxation and conduction mechanism in Pb0.75K0.5Nb2O6 new ferroelectric ceramic

Cited by 30 publications

References 39 publications

Effect of La Dopant in Modified Bismuth Ferrite Ceramics

Effect of La Dopant in Modified Bismuth Ferrite Ceramics

Diffuse phase transition and impedance spectroscopy analysis of Ba2.15−x Na0.7+x Nb5−x W x O15 (x = 0.25) ferroelectric ceramic

Dielectric behavior of manganese titanate in the paraelectric phase

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