Structural, magnetic and dielectric studies of copper substituted nano-crystalline spinel magnesium zinc ferrite

Zaki, H.M.; Al-Heniti, S.; Elmosalami, T.A.

doi:10.1016/j.jallcom.2015.01.304

Cited by 111 publications

(30 citation statements)

References 65 publications

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“…Licensed Under Creative Commons Attribution CC BY α-Fe 2 O 3 and MgO. These secondary phases were also observed in other ferrites at low annealing temperatures [10,11]. The diffraction planes are analyzed with powder software and the planes are indexed as (220), (311), (400), (422), (511) and (440) which are well matched with the earlier reports [12].…”

Section: Methodssupporting

confidence: 81%

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

2016

IJSR

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Section: Methodssupporting

confidence: 81%

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

2016

IJSR

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“…(a) For structural analysis The theoretical value of lattice constant (a th ) has been calculated from the following equation [32]:…”

Section: Theoretical Analysis For Cation Distributionmentioning

confidence: 99%

Variation in magnetic and structural properties of Co-doped Ni–Zn ferrite nanoparticles: a different aspect

Kumar

Singh

et al. 2016

J Sol-Gel Sci Technol

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Cobalt-substituted nickel-zinc ferrite nanoparticles (Ni 0.6-x Zn 0.4 Co x Fe 2 O 4 ) (x = 0, 0.0165, 0.033, 0.264 and 0.528) have been synthesized and characterized with respect to their structural and magnetic properties. Exceptionally in spite of the reported literature where the saturation magnetization increases with Co doping that attributes to Co 2? ions distribution in octahedral sites, the saturation magnetization in our samples decreases by increasing Co contents as revealed by vibrating sample magnetometer measurements. To know the structural properties such as phase identification, measurement of crystallite size and other structural parameters, prepared samples have been performed by X-ray diffraction technique. The X-ray diffraction spectra measurements show that samples have single-phase spinel cubic structure at x = 0, 0.033, 0.264 and 0.528, and at x = 0.0165, there is partial formation of hematite phase. The uncommonly decreased saturation magnetization, variation in retentivity, coercivity and magneto-crystalline anisotropy and also variation in structural properties with Co doping are explained on the basis of Co 2? ions distribution in tetrahedral and octahedral sites in place of Ni 2? and Zn 2? ions having different magnetic moments and different ionic radii, respectively. Using transmission electron microscopy, the particles size has been calculated. The morphology and stoichiometry of prepared samples have been investigated by field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy techniques, respectively. The structural and magnetic measurement results are well co-related with each other with respect to Co 2? ions doping and its distributions. The moderate saturation magnetization and low coercivity values of all samples show soft magnetic behavior and attribute the usefulness of these materials in magnetic recording devices. Graphical Abstract

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“…Porosity (P %) [28] is increasing steadily for X = 0.00 -0.60 as clear from Table 1. H. M. Zaki et al [29]. have explained the same kinds of porosity percentages.…”

Section: Micro-structural Studymentioning

confidence: 82%

Electrical, Dielectric and Magnetic Properties of Mg2+ Doped Zn-Co-La Spinel Ferrites for High Microwave Frequency (5.7-13.4 GHz) Applications

Hassan¹,

Morley²,

Ali³

et al. 2020

Preprint

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In the present research work, Mg 2+ is inserted into Zn 0.4 Co 0.6-x Mg x Fe 1.9 La 0.1 O 4 (X = 0.00, 0.15, 0.30, 0.45, 0.60) soft ferrites prepared by the co-precipitation method. Structural, optical, vibrational, dielectric, electrical and magnetic properties were explored by XRD, SEM, UV, FTIR, SMU two probe, Raman, LCR and VSM methods respectively. XRD pattern revealed the formation of cubic spinel structure in all fabricated nanoferrites by the replacement of Co 2+ ions with Mg 2+ ions. UV-Vis also verified the substitution. The declining nature of optical band gap in the range of 2.65 – 1.85 eV were observed by UV-Vis proving the Mg 2+ ions replacement. Uniform spherical shaped nanoparticles were inspected by SEM investigation in form of microimages confirming the XRD outcomes. DC Electrical resistivity showed remarkable decreasing trend with the enhancement of Mg 2+ concentration from 4.61 x 10 9 to 5.39 x 10 6 Ω-cm as Mg 2+ is more conductive than Co 2+ . Five active phonon modes of Raman were examined by Raman spectroscopy. Dielectric parameters including dielectric losses and impedance demonstrated diminishing trends with the enrichment of Mg 2+ contents. Various magnetic parameters such as magnetic moment (μ B ), anisotropy constant (K), initial permeability (μ i ), Y-K angles (α y-k ) and microwave frequency (ω m ) were disclosed for all nanoferrites. Coercivity (H c ), squareness (SQ), remanance (M r ) and saturation magnetization (M s ) all illustrated significant reducing trends with the addition of Mg 2+ contents. Hence fabricated spinel ferrite materials are highly acceptable in microwave devices and in electrical transformers to remove eddy current losses.

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Structural, magnetic and dielectric studies of copper substituted nano-crystalline spinel magnesium zinc ferrite

Cited by 111 publications

References 65 publications

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

Structural and FTIR Spectroscopic Studies of Mg-Zn Ferrite Nanoparticles Synthesized by Co-Precipitation Technique

Variation in magnetic and structural properties of Co-doped Ni–Zn ferrite nanoparticles: a different aspect

Electrical, Dielectric and Magnetic Properties of Mg2+ Doped Zn-Co-La Spinel Ferrites for High Microwave Frequency (5.7-13.4 GHz) Applications

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