Microstructural, magnetic and electrical properties of Zn0.4M0.3Co0.3Fe2O4 (M = Ni and Cu) ferrites synthesized by sol–gel method

Hcini, Sobhi; Omri, Ahmed; Boudard, Michel; Bouazizi, Mohamed Lamjed; Dhahri, A.; Touileb, Kamel

doi:10.1007/s10854-018-8674-3

Cited by 33 publications

(20 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So, we can conclude from this figure that the electrons hopping involves translational movement between neighboring sites. Such result was found in other works[28,29]. In addition, an increasing tendency in s values was observed with temperature rise.…”

supporting

confidence: 89%

Investigations of microstructural and impedance spectroscopic properties of Mg0.5Co0.5Fe1.6Al0.4O4 ferrite prepared using sol–gel method

Dabbebi

Hcini

Alzahrani

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Polycrystalline Mg0.5Co0.5Fe1.6Al0.4O4 ferrite was prepared with sol-gel method. This sample was characterized by powder X-ray diffraction (XRD), Scanning electron microscopy, and impedance spectroscopy. X-ray diffraction analysis combined with the Rietveld refinement confirmed that the sample crystallizes in a single-phase cubic spinel structure with (SG: 3 ̅ ). Electrical conductivity obeying the Jonscher power law indicates that the prepared material exhibits semiconductor behavior, and the conduction process follows the "non-overlapping small polaron tunnelling" model between neighbors' sites. The behavior of dielectric constants such as permittivity and loss coefficient has been interpreted based on the Maxwell-Wagner's theory of interfacial polarization. The curves of imaginary parts of impedance (Z'') and modulus (M'') show a dielectric-relaxation phenomenon in the sample with activation energy near to that determined from the dc conductivity study.Nyquist plots (Z″ vs. Z') show a monotonic decrease in both grain resistance (Rg) and grain boundary resistance (Rgb) with increasing temperature such as Rgb>>Rg. This result confirms that the transport mechanism for Mg0.5Co0.5Fe1.6Al0.4O4 compound is governed by the grain boundaries effect.

show abstract

supporting

confidence: 89%

Investigations of microstructural and impedance spectroscopic properties of Mg0.5Co0.5Fe1.6Al0.4O4 ferrite prepared using sol–gel method

Dabbebi

Hcini

Alzahrani

et al. 2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…The Edc value obtained from the slope of the linear fit curve for CuFeCr0.5Ni0.5O4 is equal to 0.158 eV at 100Hz and 0.126 eV for 1MHz .This values are comparable to other results in ferrite materials. Moreover, the values of activation energies are less than those found for other ferrite materials [57,58], permitting to suggest that CuFeCr0.5Ni0.5O4 sample are good conductors.…”

Section: () Tmentioning

confidence: 78%

Structural, dielectric and electrical properties of Sol–gel auto-combustion technic of CuFeCr0.5Ni0.5O4 ferrite

et al. 2021

Self Cite

View full text Add to dashboard Cite

The CuFeCr0.5Ni0.5O4 (CFO) compound was synthesized using sol-gel reaction combustion technic. The structural analysis showed that the obtained composites have a polycrystalline nature and the cubic spinel structure ( 3 ̅ space group). Microstructural analysis revealed the formation of spherical and elongated grains of our sample. The dielectric and electrical transport properties of CuFeCr0.5Ni0.5O4 were investigated in detail by Ac impedance spectroscopy in a wide range of temperature (200 K-400 K) and frequency (100Hz to100KHz). Our results show that the electrical modulus and impedance studies confirm the presence of a relaxation phenomenon with non-Debye type in the prepared sample. The activation energy Edc estimated from the slope of the linear fit plot is equal to 0.158 eV with frequency of 100Hz and 0.126 eV with frequency of 1MHz at temperature range 200K-400K.Close activation energies values were found from analyzes of relaxation time and dcconductivity indicating that the relaxation and the conduction processes may be attributed to the presence of free carrier charges and impurities at the grain boundaries. The conduction process for samples is described by the NSPT model. The complex impedance analyses and modulus formalism confirm a grain and grain boundary mechanism contributing to the dielectric properties. The real and the imaginary parts of the impedance are well fitted to equivalent electrical circuit (Rg+ Rgb//CPEgb) was used for modeling the Nyquist data.

show abstract

“…According to the Funke criterion [38], this means that the electrons hopping between Mn 3+ -Mn 4+ ions happens between neighboring sites. At a high temperature range, the dc conductivity behavior is well fitted by the following mathematical formula so called Arrhenius relation [39]:…”

Section: Electrical Conductivity Studymentioning

confidence: 99%

“…7 shows the reverse temperature variation of the relaxation time ( 𝑀" ) for La0.6Ca0.2Na0.2MnO3 perovskite. The Arrhenius relation can be also used to modelize the temperature reliance of the relaxation time as [39]:…”

Section: Electrical Modulus Analysismentioning

confidence: 99%

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Alresheedi

Hcini

Bouazizi

et al. 2020

J Mater Sci: Mater Electron

Self Cite

View full text Add to dashboard Cite

La0.6Ca0.2Na0.2MnO3 manganite was prepared using sol-gel method. Rietveld refinement of XRD pattern indicates that the prepared sample crystallizes in the rhombohedral 𝑅3𝑐 structure. The impendence spectroscopy properties of the sample were studied by performing a series of measurements as a function of temperature and frequency of conductivity, dielectric constants, modulus and impedance. From these measurements, the metal-semiconductor behaviour was observed for the sample at a transition temperature of the order of 240 K. The studies of imaginary part of permittivity and tangent loss reveal that the prepared material may be a good candidate for low-frequency energy storage devices. An electrical relaxation phenomenon with non-Debye nature was observed in variations of imaginary parts of modulus and impedance. Electrical parameters deduced from the Nyquist plots analyses using an equivalent circuit reveal that the conduction process for the sample was caused due to the grain boundaries contribution.

show abstract

Microstructural, magnetic and electrical properties of Zn0.4M0.3Co0.3Fe2O4 (M = Ni and Cu) ferrites synthesized by sol–gel method

Cited by 33 publications

References 58 publications

Investigations of microstructural and impedance spectroscopic properties of Mg0.5Co0.5Fe1.6Al0.4O4 ferrite prepared using sol–gel method

Investigations of microstructural and impedance spectroscopic properties of Mg0.5Co0.5Fe1.6Al0.4O4 ferrite prepared using sol–gel method

Structural, dielectric and electrical properties of Sol–gel auto-combustion technic of CuFeCr0.5Ni0.5O4 ferrite

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Contact Info

Product

Resources

About