Influence of rare earth ion (Y3+) on the magnetic and dc electrical properties of high density nanocrystalline MgCd ferrites

Gadkari, Ashok B.; Shinde, Tukaram J.; Vasambekar, P. N.

doi:10.1016/j.materresbull.2012.11.009

Cited by 20 publications

(5 citation statements)

References 33 publications

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“…Therefore, the AC conductivity increased with increasing frequency. Such a nature of AC conductivity is attributed to empty spaces and interactions between cerium and iron atoms …”

Section: Resultsmentioning

confidence: 99%

“…Such a nature of AC conductivity is attributed to empty spaces and interactions between cerium and iron atoms. 58 …”

Section: Resultsmentioning

confidence: 99%

“…Such a nature of AC conductivity is attributed to empty spaces and interactions between cerium and iron atoms. 58 Figure 9a−d shows the relation between dielectric loss (tan δ) and cerium concentration in various frequency regions. Figure 9a−d shows that x = 0.0 shows the lowest tan δ for all frequency regions.…”

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confidence: 99%

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Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution

Fatima,

Hasan,

Akhtar

et al. 2023

ACS Omega

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Cerium (Ce 3+ ) substitution in Cu−Cd spinel nanoferrites with the compositional formula Cu 0.5 Cd 0.5 Fe 2−x Ce x O 4 (x = 0.0, 0.0125, 0.0250, 0.0375, 0.050) was performed by the hydrothermal route. The structural, morphological, optical, electrical, and dielectric properties of Ce-substituted Cu−Cd ferrites were explored. X-ray diffraction revealed the single-phase cubic structure of all nanoferrites. The average crystallite size (72.42−11.61 nm) and lattice constant (8.419−8.449 Å) were observed for the synthesized ferrites. The surface shapes of particles were determined by scanning electron microscopy. The substitution was also verified by Fourier transform infrared spectroscopy and ultraviolet−visible spectrophotometry. The semiconducting behavior of ferrites was determined from their electrical properties, such as direct current (DC) electrical resistivity. The Curie temperature was observed at 523 K temperature for all nanoferrites. The dielectric constant and dielectric loss significantly indicated the reducing behavior with an increase in the cerium concentration. The sample Cu 0.5 Cd 0.5 Fe 1.975 Ce 0.025 O 4 resulted in the lowest optical bandgap energy, DC resistivity, and dielectric losses. The nature of the electrical resistivity and dielectric constants indicate that the designed materials are highly appropriate for the design of microwave gadgets.

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“…Therefore, the AC conductivity increased with increasing frequency. Such a nature of AC conductivity is attributed to empty spaces and interactions between cerium and iron atoms …”

Section: Resultsmentioning

confidence: 99%

“…Such a nature of AC conductivity is attributed to empty spaces and interactions between cerium and iron atoms. 58 …”

Section: Resultsmentioning

confidence: 99%

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Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution

Fatima,

Hasan,

Akhtar

et al. 2023

ACS Omega

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“…Hence, the concentration of the substituted rare earth ions in the cell structure has limited solubility in the spinel lattice due to their large ionic radii. There are a number of reports written by researchers talking about the effect of adding rare earth elements on the properties of spinel ferrite nano-ferrite compounds [7][8][9][10][11][12][13]. Previous studies illustrated that it can be produced single-phase spinel nickel ferrite compounds doped with holmium and with yttrium rare earth ions with solubility limits equal to 0.15 and 0.07, respectively, and the lattice constant of mentioned nickel ferrite compounds samples increases with increasing both rare earth elements.…”

Section: Introductionmentioning

confidence: 99%

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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“…The researchers and engineers have investigated that Nanoferrites show tremendous properties compared to their bulk counterparts. In the nano regime, grain boundaries control physical properties instead of grains (Gadkari, Shinde, & Vasambekar, 2013).…”

Section: Introductionmentioning

confidence: 99%

Role of Tb-Cr Substitution on the Structural and Magnetic Properties of Cobalt Ferrites

Hameed

Khaliq

2021

J. Mat. Phy.

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The impact of Tb-Cr substitution in cobalt-based ferrites having composition Co1-xTbxFe2-yCryO4 (x=0.0-0.1, y=0.0-0.5) prepared by solid state reaction method on structural, magnetic and dielectric parameters was explored. Structural analysis was carried out by X-ray diffraction technique. A variation in lattice parameter (a) was observed as a function of doping. The lattice constant ‘a’ increases from 8.37 Å to 8.39 Å, whereas crystallite size (D) decreases from 44 nm to 28 nm with Tb-Cr substitution. Unit cell volume was found in the range 586.8 Å3 - 590.6 Å3. X-ray density, bulk density as well as porosity were also affected with the inclusion of Tb-Cr ions. Saturation magnetization and remanence were observed to decrease from 62 emu/g to 51 emu/g and 13.38 emu/g to 8.29 emu/g, respectively with the addition of Tb-Cr contents. The incorporation of Tb-Cr cations caused the decrease in dielectric parameters like dielectric constant as well as dielectric loss.

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Influence of rare earth ion (Y3+) on the magnetic and dc electrical properties of high density nanocrystalline MgCd ferrites

Cited by 20 publications

References 33 publications

Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution

Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution

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

Role of Tb-Cr Substitution on the Structural and Magnetic Properties of Cobalt Ferrites

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Influence of rare earth ion (Y3+) on the magnetic and dc electrical properties of high density nanocrystalline MgCd ferrites

Cited by 20 publications

References 33 publications

Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu0.5Cd0.5Fe2–xCexO4) by Cerium (Ce3+) Ion Substitution

Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu0.5Cd0.5Fe2–xCexO4) by Cerium (Ce3+) Ion Substitution

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

Role of Tb-Cr Substitution on the Structural and Magnetic Properties of Cobalt Ferrites

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Product

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Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution

Comprehensive Improvement of Various Features of Cu–Cd Ferrites (Cu_0.5Cd_0.5Fe_2–xCe_xO₄) by Cerium (Ce³⁺) Ion Substitution