Study of spinel ferrites with addition of small amount of metallic elements

Farid, Hafiz Muhammad Tahir; Ahmad, Ishtiaq; Ali, Irshad; Ramay, Shahid M.; Mahmood, Asif

doi:10.1007/s10832-018-0154-x

Cited by 34 publications

(5 citation statements)

References 25 publications

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“…However, for both methods, the prepared samples own single domain. According to references [46,47], the [38] Sample No. D (nm) M s (emu g −1 ) H c (Oe) particles possess single domain if the squareness ratio M r /M s value 0.5 or less.…”

Section: ( ) /mentioning

confidence: 99%

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite

Khalafallah,

Siddig,

Algethami

et al. 2024

Mater. Res. Express

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Structural, optical, and magnetic properties of ferrite series with chemical formula Zn0.5NixMg0.5-xFe2O4 (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were investigated. Co-precipitation and sol-gel methods were used to synthesis the samples and to investigate further the influence of these preparation methods on the properties of Zn0.5NixMg0.5-xFe2O4 nano-ferrites. X-ray diffraction and Fourier-transform infrared spectroscopy revealed that the samples crystallize in a cubic spinel structure with space group Fd3m:1. The crystallite size of Zn0.5NixMg0.5-xFe2O4 nanoparticles was decreased from 19.15 to 11.65 nm with increasing Ni content for the samples of co-precipitation method, while the opposite behavior was observed in case of sol-gel method which was increased from 13.90 to 21.90 nm. Moreover, the optical investigation by UV-visible spectroscopy revealed that the energy band gap of the samples of co-precipitation method ranged (6.04 - 6.08) eV compared to (4.44 - 4.50) eV of sol-gel method. For both methods, substitution of Ni+2 by Mg+2 in Zn0.5NixMg0.5-xFe2O4 affects the remanent magnetization (Mr), coercivity (Hc) and saturation magnetization (Ms) suggesting the super-paramagnetic behavior of the samples. The substitution of Ni resulted in small values of coercivity ranged 0.758 to 164.62 Oe. The Ms was ranged 20.39 to 127.57 emu/g and an enhancement in magnetization was observed which increases the value of Ms that was found to be maximum with x=0.4 of co-precipitation method (127.57 emu/g). The magnetic behavior of synthesized Ni doped nanoparticles makes them suitable candidate for sensing and high-frequency applications and for use in hyperthermia treatment. The characterization outcomes may recommend that co-precipitation method is preferred over sol-gel method for refined structure and preferable properties of Zn0.5NixMg0.5-xFe2O4 nanoparticles.

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Section: ( ) /mentioning

confidence: 99%

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite

Khalafallah,

Siddig,

Algethami

et al. 2024

Mater. Res. Express

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“…The two semicircles indicating the two relaxation phenomena and providing the details of grains and grain boundaries [57]. The existence of one semicircle at lower frequency region giving information about relaxation in grain boundaries while the other at high frequency domain providing the knowledge of resistance due to grains [58][59][60] and may reduce the DC conductivity. The graph contains semicircles confirming that at low frequency, impedance behavior follows Cole-Cole formula [60].…”

Section: Cole-cole Plotmentioning

confidence: 99%

“…The existence of one semicircle at lower frequency region giving information about relaxation in grain boundaries while the other at high frequency domain providing the knowledge of resistance due to grains [58][59][60] and may reduce the DC conductivity. The graph contains semicircles confirming that at low frequency, impedance behavior follows Cole-Cole formula [60]. The curves shifted away from the origin as the resistance of material increases.…”

Section: Cole-cole Plotmentioning

confidence: 99%

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

et al. 2022

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Herein, we used sol-gel auto combustion technique for fabrication of the series of nickel substituted magnesium-zinc spinel ferrite (Mg0.3NixZn0.7-xFe2O4) nanoparticles by varying nickel concentrations as 0.00 ≤ x ≤ 0.20. X-ray diffraction (XRD) investigation evidenced that the synthesized nanomaterials are of spinel ferrite nature with secondary phase. Moreover, the crystallite size was observed to be in the range from 13 to 17 nm as estimated by Scherrer’s formula. It has been found that the structural parameters (e.g., bulk density, lattice constant, micro strain, crystallite size, surface area etc.) of the as-synthesized magnesium-zinc spinel ferrite nanoparticles have been strongly influenced by doping content of nickel. Moving further, we have investigated the dielectric properties of the prepared nanoparticles in the frequency range from 20 Hz to 20 MHz. The remarkable electric modulus, impedance and dielectric properties of the prepared spinel ferrites made these materials a potential candidate for low- and high-frequency applications.

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“…Some doped or substituted elements may suppress the decomposition of oxides and result in a more stable spinel structure for the oxides [26,43,44]. The crystal structure of the as-sintered Mn-Ni-Co oxides is a cubic spinel with a small amount of Ni-rich oxide phase, but no Ni-rich phase is detected in the Cr-substituted samples which is a single-phase of cubic spinel structure.…”

Section: Element Doping and Spinel Typesmentioning

confidence: 99%

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

et al. 2020

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Mn-Co and Cu-Mn based alloy coatings are deposited on 430 SS by high energy micro-arc alloying process, and then alloy coatings are oxidized at 750 ℃ in air to form the spinel oxides. Some composite oxides, such as Co3O4, Mn2O3 and (Mn,Co)3O4, are formed at the initial stage of oxidation. The single-phase spinel (pure MnCo2O4) without impurity phases is only found on the surface of Co-33Mn-17Cu oxide layer with the extended oxidation time, its area-specific resistance values at 500 ℃ to 800 ℃ are low and close to that of Mn-35Cu oxide layer which mainly composed of Cu1.2Mn1.8O4 spinel.

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Study of spinel ferrites with addition of small amount of metallic elements

Cited by 34 publications

References 25 publications

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

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Study of spinel ferrites with addition of small amount of metallic elements

Cited by 34 publications

References 25 publications

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn0.5Mg0.5−xNixFe2O4 nano-ferrite

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn0.5Mg0.5−xNixFe2O4 nano-ferrite

Effect of nickel substitution on structural and dielectric properties of Mg-Zn based spinel ferrite nanoparticles

The evolution of microstructure and electrical performance in doped Mn-Co and Cu-Mn oxide layers with the extended oxidation time

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Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite

Influence of preparation method on structural, optical and magnetic properties of synthesized Zn_0.5Mg_0.5−xNi_xFe₂O₄ nano-ferrite