Influence of Co2+ on structural and electromagnetic properties of Mg–Zn nanocrystals synthesized via co-precipitation route

Rafiq, Muhammad; Khan, Muhammad Azhar; Asghar, M.; Ilyas, Syed Zafar; Shakir, Imran; Shahid, Muhammad; Warsi, Muhammad Farooq

doi:10.1016/j.ceramint.2015.04.141

Cited by 38 publications

(5 citation statements)

References 29 publications

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“…As can be seen from the Table 1, X-ray densities are greater than bulk densities for all samples. This difference is a result of the porous structure of the growing sample during sintering or production (Rafiq et al, 2015). To determine the physical and electrical properties of the ferrites, it is important to examine the morphology and grain shapes of the samples (Şaşmaz Kuru et al, 2019).…”

Section: Structural Resultsmentioning

confidence: 99%

“…As can be seen from the Table 1, X-ray densities are greater than bulk densities for all samples. This difference is a result of the porous structure of the growing sample during sintering or production (Rafiq et al, 2015). 1 The crystallite size (D), lattice parameter (a), cell volume (V), X-ray density (dx), bulk density (dbulk), porosity P (%) and specific surface area (S) values of the samples.…”

Section: Figure2 Xrd Pattern Of the Comgla Ferritementioning

confidence: 99%

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Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

Kuru

2021

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In this study, structural, morphological, dielectric and AC conductivity properties of CoMgLa ferrite samples (Co0.5Mg0.5LaxFe2-xO4) were investigated according to the change of x (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5). Samples were synthesized by co-precipitation method. The structural properties were examined using XRD and results show that the prepared sample crystallizes in the cubic spinel structure. Crystallite sizes are changing between 24.92 to 9.80 nm. Morphological and elemental properties were analyzed by SEM and EDX. Dielectric properties were investigated by impedance spectroscopy. The samples showed normal dielectric properties consistent with the Maxwell-Wagner model due to interfacial polarization. When the impedance characteristics were examined, it was found that the relaxation process was compatible with the Cole-Cole model. The results of the modulus show that grains contribute to the relaxation process as well as grain boundaries. AC conductivity exhibited semiconductor behavior. The constant behavior of conductivity at low frequencies is a sign that the examined samples may be suitable for many applications.

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Section: Structural Resultsmentioning

confidence: 99%

“…As can be seen from the Table 1, X-ray densities are greater than bulk densities for all samples. This difference is a result of the porous structure of the growing sample during sintering or production (Rafiq et al, 2015). 1 The crystallite size (D), lattice parameter (a), cell volume (V), X-ray density (dx), bulk density (dbulk), porosity P (%) and specific surface area (S) values of the samples.…”

Section: Figure2 Xrd Pattern Of the Comgla Ferritementioning

confidence: 99%

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

Kuru

2021

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…The porosity of the composition was in the range of 14.25-18.08 %. Rafiq et al [184] observed that the particle size decreased with cobalt amount (x) and it attained its lowest value (30.94 nm) at x = 0.05. This reduction in size was because of the replacement of smaller radii of ions of cobalt with Mg-Zn ions.…”

Section: Structural Propertiesmentioning

confidence: 99%

Mg‐Zn Ferrite Nanoparticles: A Brief Review on Synthesis, Characterizations, and Applications

Thakur,

Kumari,

Singh

et al. 2023

ChemBioEng Reviews

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Ferrites are of great interest for both fundamental science and technological applications due to their outstanding physical, chemical, and magnetic properties. Among various ferrites, Mg‐Zn ferrites is one of the best magnetic materials for researchers due to their unique properties such as high electric resistivity, Curie temperature, low coercivity, low eddy current, dielectric losses, low cost, and better environmental stability. This makes ferrites suitable for many applications such as power transformers, microwave devices, computer memories, logic devices, recording heads, loading coils, antenna rods, color monitoring tubes, telecommunications, hyperthermia, and so forth. Mg‐Zn ferrite nanoparticles have gained increased interest for many applications such as catalysts, antimicrobial potential, and sensors for the detection of combustible gases (CH4, CO, and CO2). In this brief review, the strategies used in the synthesis of Mg‐Zn ferrite nanoparticles are summarized. The different structural, morphological, magnetic, and electric properties of these ferrites are analyzed.

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“…But when the cobalt content diminishes the crystallite size amplifies to maximum at (X = 0.60). This is because of the relocation of Fe 3+ ions as Fe 3+ ions shifts from octahedral site to tetrahedral site to keep the charge neutral [23]. The lattice constant is observed in the range of 8.433 -8.428 for X = 0.00 -0.60.…”

Section: Micro-structural Studymentioning

confidence: 99%

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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Influence of Co2+ on structural and electromagnetic properties of Mg–Zn nanocrystals synthesized via co-precipitation route

Cited by 38 publications

References 29 publications

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

Mg‐Zn Ferrite Nanoparticles: A Brief Review on Synthesis, Characterizations, and Applications

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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