Nickel-Doped Cobalt Zinc Ferrites Co0.8 – xNixZn0.2Fe2O4 (x = 0.0–0.56) by Solid-State Reaction: Synthesis and Characterization

Kolekar, R. Y.; Kapatkar, S. B.; Mathad, S. N.

doi:10.3103/s1061386220040044

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…The reduction in the lattice constant can be attributed to the difference between the radius of the Mn +2 ion of 0.97 A°compared to the radius of iron (0.64 A°) and cobalt (0.88 A°) 16 ions, in addition to the migration of some Fe +3 ions from site A to site B. 22 The X-ray density (ρ x ) of all samples was calculated using Eq. 2, where M is the molecular weight, (N) is Avogadro's number and (a) is the lattice parameter: 21 x 8M Na 2…”

Section: Resultsmentioning

confidence: 99%

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

Saeed,

Hussain,

Ismail

2024

ECS J. Solid State Sci. Technol.

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Nanopowders of Mn-substituted CoFe2O4 were prepared in different proportions using the sol-gel auto-combustion method and were structurally and morphologically studied. In another step, composites based on polyvinyl alcohol (PVA) with Mn-substituted CoFe2O4 fillers were prepared, and the effect of the Mn-substituted CoFe2O4 on the optical, magnetic, and dielectric properties was studied. X-ray analysis revealed the formation of polycrystalline Mn-substituted CoFe2O4. The results showed a decrease in the lattice constant with Mn2+ substituted and incorporated into the crystal structure of CoFe2O4. The Fourier confirmed the spinel structure of the Mn-substituted CoFe2O4 transform infrared spectrum where absorption bands appeared at 569–561 and 446–407 cm-1, which are attributed to tetrahedral and octahedral groups. The magnetic properties were affected when Mn ions were substituted with CoFe2O4, as shown by the results of VSM. It was observed that the saturation magnetization, remnant magnetization, and coercivity decreased with increasing Mn content. The dielectric constant and loss tangent of PVA/MnxCo1−xFe2O4 were also studied. The difference in the diameters of the substituted and host ions causes the dielectric constant to increase following the substitution of Mn ions.

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Section: Resultsmentioning

confidence: 99%

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

Saeed,

Hussain,

Ismail

2024

ECS J. Solid State Sci. Technol.

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“…Javed Iqbal et al, [70] fabricated chromium doped cobalt nanoferrites by microemulsion synthesis. The lattice parameter decreased with increase in Cr content because smaller ionic radius of dopant Cr 3+ as compared to Fe 3+ .…”

Section: Cr Substitutionmentioning

confidence: 99%

A Review on Synthesis, Properties and Applications on Cobalt Ferrite

Kashid¹,

Suresh²,

Mathad³

et al. 2022

IJASE

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Cobalt ferrite has attracted much attention owing to its excellent properties and huge technological applications. The novel synthesis methods such as co-precipitation method, solid state method, sol-gel method, auto combustion method, precursor technique, hydrothermal technique, spray pyrolysis technique etc. have been used for its preparation. Along with numerous outstanding properties of cobalt ferrite several chemical modifications like modifying reaction conditions, substituting one or more ions with other metal ions enhanced the configuration of grains of cobalt ferrite. With all the factors the role of dopant in chemical composition is extreme important because it modifies the structural, electrical, magnetic and catalytic properties of cobalt ferrite. In this review, we summarize the synthesis and properties of cobalt ferrites with significant developments. The applications of cobalt ferrite in several fields are also highlighted in this review.

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“…Several studies have documented the effective fabrication of single‐phase nanocrystalline spinel ferrites with rare‐earth (RE 3+ ) substitution using numerous conventional and unconventional methods of preparation, including the hydrothermal route, [ 14 ] co‐precipitation method, [ 15–17 ] sol‐gel auto‐combustion technique, [ 4,18–20 ] microemulsion method [ 21 ] and solid‐state method. [ 22,23 ] These methods have been effective in manipulating the characteristics of spinel ferrites. Compared to the above‐mentioned methods, the sol‐gel auto‐combustion route offers a versatile and efficient approach to synthesize spinel ferrites with controlled composition, morphology, and homogeneity, thereby making it a preferred method for many applications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Crystallographic, Morphological, Magnetic and Electrochemical Properties of La‐Doped Cu‐CoFe₂O₄ Spinel Ferrites

Khan,

Mahajan,

Srivastava

2024

Cryst. Res. Technol.

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This research presents the successful synthesis of Cu0.79Co0.21LaxFe2‐xO4 (0.0 ≤ x ≤ 0.8) (spinel ferrite) nanoparticles via the sol‐gel auto combustion technique, with varying La3+ dopant concentrations. In this study, the estimated crystallite size (D) is found to be in the range of (27.92–40.90) nm. The microstructural parameter determination in XRD data is improved using Rietveld refinement. Fourier Transform Infrared Spectroscopy (FTIR) spectra exhibit two distinct metal stretching vibrational bands within (400–600) cm−1 range, a characteristic fingerprint region for all ferrites. Field Emission Scanning Electron Microscopy (FESEM) analysis reveals the agglomeration of particles due to magnetic interactions and non‐uniform distribution of average particle sizes ranging from (1.06–1.87) µm. Energy Dispersive X‐Ray Analysis (EDX) validates the chemical composition's accuracy. Owing to the dilution effect resulting from the introduction of non‐magnetic La3+ ions into the ferrite structure, there is a reduction in the saturation magnetization value, decreasing from 37.28 to 6.24 emu g−1 in the Vibrating Sample Magnetometery (VSM) study. The electrochemical analysis reveals the impressive electrochemical characteristics of the newly developed ferrites, highlighting a remarkable specific capacitance of 270.0 F g−1. This finding positions them as highly promising contenders for a wide range of energy storage supercapacitor applications.

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Nickel-Doped Cobalt Zinc Ferrites Co0.8 – xNixZn0.2Fe2O4 (x = 0.0–0.56) by Solid-State Reaction: Synthesis and Characterization

Cited by 5 publications

References 13 publications

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

A Review on Synthesis, Properties and Applications on Cobalt Ferrite

Investigation of Crystallographic, Morphological, Magnetic and Electrochemical Properties of La‐Doped Cu‐CoFe₂O₄ Spinel Ferrites

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Nickel-Doped Cobalt Zinc Ferrites Co0.8 – xNixZn0.2Fe2O4 (x = 0.0–0.56) by Solid-State Reaction: Synthesis and Characterization

Cited by 5 publications

References 13 publications

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

Structural, Optical, and Morphological Study of Manganese Substituted Cobalt Ferrite and Its Effect on the Magnetic and Dielectric Properties of PVA Composites

A Review on Synthesis, Properties and Applications on Cobalt Ferrite

Investigation of Crystallographic, Morphological, Magnetic and Electrochemical Properties of La‐Doped Cu‐CoFe2O4 Spinel Ferrites

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Investigation of Crystallographic, Morphological, Magnetic and Electrochemical Properties of La‐Doped Cu‐CoFe₂O₄ Spinel Ferrites