How cobalt ions substitution changes the structure and dielectric properties of magnesium ferrite?

Druc, A.C.; Borhan, Adrian Iulian; Diaconu, Andrei; Iordan, Alexandra-Raluca; Nedelcu, G.G.; Leontie, Liviu; Palamaru, M.N.

doi:10.1016/j.ceramint.2014.05.071

Cited by 53 publications

(20 citation statements)

References 35 publications

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“…This indicates that cobalt atoms are entirely incorporated into zinc magnesium ferrites. Same varieties of results were found by A. C. Druc et al [14]. Also, as the Mg 2+ contents increase the crystallite size decreases for X = 0.00 to X = 0.45.…”

Section: Micro-structural Studysupporting

confidence: 78%

“…In zinc, cobalt and magnesium ferrites rare earth metals are inserted to develop characteristics of materials and to bring improvements in resistivity and permeability [1]. Substitution of magnesium with cobalt shows typical dielectric behavior and low dielectric losses [14]. Different synthesis techniques like spraypyrolsis [15], citrate gel [16], hydro thermal [17], sol-gel [18], microwave refluxing [19] and co-precipitation [20,21] can be implemented to synthesize the nanoferrite particles.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Micro-structural Studysupporting

confidence: 78%

Section: Introductionmentioning

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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“…Here it will be even more interesting to study the change in properties of MgFe 2 O 4 when doped with other metals. Earlier as per the literature Cr [3,12], Gd [13], Dy [14], Sm [15], Co [16], NiACo [17], Li [18], CoACr [19], Cd [20], Cu [21], Pr [22], Tb [23], Ca [24], etc. have been used as dopants in ferrites and their properties have been explored.…”

Section: Introductionmentioning

confidence: 94%

Tailoring the super-paramagnetic nature of MgFe 2 O 4 nanoparticles by In 3+ incorporation

Naik

Salker

2016

Materials Science and Engineering: B

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“…The significant electrical and magnetic properties of ferrites lead the material to be utilized in applications such as high-frequency transformer P. Manohar pmano@annauniv.edu 1 Department of Ceramic Technology, Anna University, A.C.Tech campus, Chennai, 600025, India cores, antenna rods, loading coils in microwave devices, gas sensors, catalysts, and magnetic-drug delivery [2].…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Electrical Properties of Magnesium-Substituted Ni–Zn Ferrites

Kavitha

Manohar

2016

J Supercond Nov Magn

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The effect of magnesium substitution in Ni-Zn ferrites (Ni 0.80−x Mg x Zn 0.20 Fe 2 O 4 , where x = 0, 0.10-0.50) was studied on its electrical and magnetic properties. Ni-Mg-Zn ferrites were synthesized by novel combustion method, followed by calcination at 900 • C. The X-ray diffraction (XRD) pattern shows that the prepared sample was a single-phase spinel cubic structure, and the calculated crystallite sizes were found to be in the range 44-48 nm. Fourier transform infrared spectroscopy (FTIR) spectra confirm the tetrahedral and octahedral modes of vibrations. The observed saturation magnetization values range from 37 to 63 emu/g for magnesium-added Ni-Zn ferrites. The increase in resistivity was observed with the addition of magnesium ions except for the concentration of x = 0.50. The change in dielectric behavior with respect to composition and frequency were studied.

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How cobalt ions substitution changes the structure and dielectric properties of magnesium ferrite?

Cited by 53 publications

References 35 publications

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

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

Tailoring the super-paramagnetic nature of MgFe 2 O 4 nanoparticles by In 3+ incorporation

Magnetic and Electrical Properties of Magnesium-Substituted Ni–Zn Ferrites

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