Effect of Ce-substitution on structural, morphological, magnetic and DC electrical resistivity of Co-ferrite materials

Mammo, Tulu Wegayehu; Murali, N.; Mulushoa, S. Yonatan; Arunamani, T.

doi:10.1016/j.physb.2017.12.049

Cited by 39 publications

(3 citation statements)

References 21 publications

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“…The non-magnetic Cu resides in a tetrahedral (A) site whose doping can modify the structural, electrical, and magnetic properties (5)(6)(7) . Doping of Al (8,9) , Ge (10) , Cu (11) , Ni (12) , Cr (13) , Sm-Gd (14) , Ce-Gd (15) on magnesium ferrite and their effects on the electrical, dielectric and magnetic properties were studied (16)(17)(18) . However, solid-state synthesis was rarely used, which has a different impact on the sample size (19) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Komali¹,

Murali²,

Parajuli³

et al. 2021

IJST

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Objective: To prepare Cu doped Mg 0.5−x Cu x Zn 0.5 Fe 2 O 4 (x = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.25) spinel ferrites materials and study the structure, morphology, and magnetic properties. Methods: Cu doped Mg-Zn spinel ferrites are magnetic and highly resistive materials. They were synthesized by the method of solid-state reaction and characterized by x-ray diffraction (XRD), field effect scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), and vibrating sample magnetometer (VSM) for their structural, compositional, morphological, functional properties. They are with spinel structure under Fd-3m space group. Their crystallite size was 44.58 nm to 31.02 nm range after calcined at 1000 o C. Their spinel structure was confirmed with FT-IR analysis, whose absorption bands were 598.84 -580.40 cm -1 and 405.35 -402.15 cm -1 range for higher and lower frequency, respectively. The value of coercivity is in the range 146.33 -9.427 Oe with the variation of content. The lower values of the coercivity indicated the soft ferrimagnetic nature of the synthesized materials. Findings/ Application: Substitution of non-magnetic Cu 2+ ions strongly influenced the structural and magnetic properties of magnesium ferrites.

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Section: Introductionmentioning

confidence: 99%

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Komali¹,

Murali²,

Parajuli³

et al. 2021

IJST

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“…The erbium ions reduce the lattice constant and increase the size of the crystals of Li-Ni spinel ferrite compounds [14]. In another study, an increase in the lattice constant and a decrease in the crystallite size were achieved, with an increase in the cerium ions content in cobalt spinel ferrite [15]. The lattice constant of nickel-zinc spinel ferrite compounds increases with increasing cerium ions [16].…”

Section: Introductionmentioning

confidence: 94%

Enhancement of Ni–Zn ferrite nanoparticles parameters via cerium element for optoelectronic and energy applications

Kershi,

Alshehri,

Attiyah

2023

Discover Nano

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This work is concerned with fabricating ferrite nanoparticles of nickel–zinc with the chemical formula: Ni0.55Zn0.45Fe2−xCexO4, 0 ≤ x ≤ 0.011 by co-deposition technique and modifying their electrical, microscopic, spectroscopic, optical, electrical and dielectric properties as advanced engineering materials through doping with the cerium (Ce) element. XRD patterns displayed that the samples have a monophasic Cerium–Nickel–zinc (CNZ) spinel structure without other impurities for cerium concentration (x) ≤ 0.066. Both values of crystallite size and lattice parameters decrease from 33.643 to 23.137 nm and from 8.385 to 8.353 nm, respectively, with the increasing Ce ions substitution content from 0 to 0.066. SEM images indicate that grains of the fabricated compounds are smaller, more perfect, more homogeneous, and less agglomeration than those of the un-doped Ni–Zn nano-ferrites. The maximum intensity of first-order Raman spectral peaks (Eg, F2g(2), A1g(2), and A1g(1)) of CNZ ferrite nanoparticles are observed at about (330, 475, 650, 695) cm−1, respectively, that confirms the CNZ samples have the cubic spinel structure. The direct and indirect optical energy bandgaps of CNZ samples have a wide spectrum of values from semiconductors to insulators according to cerium concentration. The results showed that the values of dielectric constant, dielectric loss factor, and Ac conductivity and the conductivity transition temperature are sensitive to cerium ions content. AC conductivity exhibited by the CNZ samples has the semiconductor materials behavior, where the AC conductivity increases due to temperature or doping concentration. The results indicate that Ni0.55Zn0.45Fe1.944Ce0.066O4 ferrite nanoparticles may be selected for optoelectronic devices, high-frequency circuits, and energy storage applications.

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“…Mn-Zn ferrites have a spinel crystal lattice in which metal cations occupy octahedral and tetrahedral positions in the sublattices. The distribution of cations in the sublattices has a significant effect on the magnetic properties of spinel ferrites [6,7]. Since the method of obtaining Mn-Zn ferrites is a complex multistage process, an important task is to control the processing conditions at each stage carefully.…”

Section: Introductionmentioning

confidence: 99%

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

Kuzmin,

Khabirov,

Mass

et al. 2023

Chim.Tech.Acta

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The magnetic properties of Mn-Zn ferrites depend strongly on the microstructure, chemical and phase composition. In this paper the effect of synthesis and sintering conditions on the structure, phase composition and properties of Mn-Zn ferrites is investigated. The specimens for the study were obtained by pressureless sintering. The magnetic properties were measured on a B-H analyzer. The structure was investigated by XRD and SEM. Materials with an average grain size of 2.2 μm were obtained by sintering at a temperature of 1265 °C. It was found that an increase in the synthesis temperature from 700 to 1000 °C promotes the growth of the initial magnetic permeability of these materials from 1100 to 1370. The rapid cooling of the powders synthesized at 1000 °C allows maintaining a high content of the spinel phase. In the structure of materials obtained by sintering powders with initially high spinel content at 1300 °C, grains of abnormally large size are formed. This leads to an increase in the initial permeability, magnetic induction at Hm = 1200 A/m, f = 10 kHz and magnetic losses at high frequencies (up to 500 kHz). A material with fine-grained structure was obtained by using air at the heating stage of pressureless sintering. This contributed to the reduction of magnetic losses without a significant decrease in Bm.

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Effect of Ce-substitution on structural, morphological, magnetic and DC electrical resistivity of Co-ferrite materials

Cited by 39 publications

References 21 publications

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Effect of Cu2+ substitution on structure, morphology, and magnetic properties of Mg-Zn spinel ferrite

Enhancement of Ni–Zn ferrite nanoparticles parameters via cerium element for optoelectronic and energy applications

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

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