Microstructural properties, conduction mechanism, dielectric behavior, impedance and electrical modulus of La0.6Sr0.2Na0.2MnO3 manganite

2019 ◽  
Vol 30 (3) ◽  
pp. 2975-2984 ◽  
Author(s):  
Raihane Charguia ◽  
Sobhi Hcini ◽  
Michel Boudard ◽  
Abdessalem Dhahri
Keyword(s):  
Conduction Mechanism ◽  
Dielectric Behavior ◽  
Electrical Modulus ◽  
Microstructural Properties

scholarly journals Dielectric, impedance, modulus spectroscopy and AC conductivity studies on novel organic ferroelectric diisopropylammonium chloride (dipaCl)

2021 ◽  
pp. 2150015
Author(s):  
Mamataj Khatun ◽  
Ekramul Kabir
Keyword(s):  
Dielectric Property ◽  
Hydrochloric Acid ◽  
Dielectric Permittivity ◽  
Ac Conductivity ◽  
Conduction Mechanism ◽  
Arrhenius Equation ◽  
Methanol Solution ◽  
Power Exponent ◽  
Electrical Modulus ◽  
Modulus Spectroscopy

Organic molecular ferroelectric diisopropylammonium chloride (dipaCl) was successfully synthesized using diisopropylamine, hydrochloric acid (57%) and methanol solution. Dielectric permittivity, impedance, modulus spectroscopy and conductivity were systematically studied by Capacitance–Conductance ([Formula: see text] – [Formula: see text] measurements in the temperature range of 373–445 K. Dielectric property tests clearly show that the organic molecular ferroelectric dipaCl obeys Curies–Weiss law 1/[Formula: see text] = ([Formula: see text]–[Formula: see text]/[Formula: see text]. The real (Z′) and imaginary (Z′′) parts of the electrical modulus were calculated from the various values of 𝜀′ and 𝜀′′. It is shown that AC conductivity satisfies the relation [Formula: see text], where the power exponent [Formula: see text] depends on temperature and frequency. From Arrhenius equation, the activation energies [Formula: see text]and [Formula: see text] are also calculated which describes the complete conduction mechanism of dipaCl.

Study of structural, conduction mechanism and dielectric behavior of La0.7Sr0.3Mn0.8Fe0.2O3 manganite

2020 ◽  
Vol 31 (23) ◽  
pp. 21732-21746
Author(s):  
Z. Raddaoui ◽  
S. El Kossi ◽  
Thamraa Al-shahrani ◽  
M. Bourguiba ◽  
J. Dhahri ◽  
...  
Keyword(s):  
Conduction Mechanism ◽  
Dielectric Behavior

Conduction mechanism, impedance spectroscopic investigation and dielectric behavior of La0.5Ca0.5−xAgxMnO3 manganites with compositions below the concentration limit of silver solubility in perovskites (0 ≤ x ≤ 0.2)

2015 ◽  
Vol 44 (22) ◽  
pp. 10457-10466 ◽  
Author(s):  
H. Rahmouni ◽  
M. Smari ◽  
B. Cherif ◽  
E. Dhahri ◽  
K. Khirouni
Keyword(s):  
Electrical Properties ◽  
Spectroscopic Investigation ◽  
Conduction Mechanism ◽  
Complex Impedance ◽  
Impedance Analysis ◽  
Dielectric Behavior ◽  
Concentration Limit ◽  
Complex Impedance Analysis

This study presents the electrical properties, complex impedance analysis and dielectrical behavior of La0.5Ca0.5−xAgxMnO3 manganites.

Temperature dependence of electrical conductivity and dielectric properties in Li–Mn ferrite

2014 ◽  
Vol 92 (6) ◽  
pp. 522-528 ◽  
Author(s):  
S.A. Mazen ◽  
N.I. Abu-Elsaad
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
Room Temperature ◽  
Conduction Mechanism ◽  
Dielectric Behavior ◽  
Lithium Ferrite ◽  
Ac Conductivities ◽  
Polarization Process ◽  
Wide Range ◽  
Mn Content

Manganese substituted lithium–ferrite with the general formula Li0.5–0.5xMnxFe2.5–0.5xO4 (where x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9, and 1.0) were synthesized by the standard ceramic technique. The variation of DC and AC conductivities has been reported as a function of temperature from room temperature (293 K) up to 970 K in static air. AC measurements were carried out over a wide range of frequencies from 100 Hz up to 1 MHz. The variation ln σ at room temperature with composition indicates that the conductivity initially increases up to 0.5 and then decreases with further addition in Mn content. The activation energy of the conduction mechanism decreases from 0.68 to 0.34 eV. The electrical conductivity in the present ferrite is explained on the basis of the hopping mechanism. Dielectric properties, such as dielectric loss tangent, tanδ, and dielectric constant, ε′, have been measured. The dielectric behavior is explained by using the mechanism of the polarization process.

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