Effect of γ-radiation on structural, morphological, magnetic and dielectric properties of Zn–Cr substituted nickel ferrite nanoparticles

The nanoparticles of Co0.75Ni0.25Fe2−zDyzO4 (z = 0.0 and 0.05) were prepared by the sol-gel auto-combustion method. The cation distribution was calculated from the Rietveld refinement of the XRD pattern to confirm a mixed inverse spinel structure. The crystallite size was calculated by the Debye–Scherrer method, modified Scherrer method, Williamson Hall plot method, and size-strain plot method for prepared samples. The variation in crystallite size was observed due to the contribution of lattice strain on line peak broadening. From Fourier transform infrared (FT-IR) spectrum the absorption bands appeared at 574.79 cm−1 and 414.70 cm−1 reveals spinel ferrite structure for Co0.75Ni0.25Fe1.95Dy0.05O4. The particle size from a high-resolution scanning electron microscope (HR-SEM) the image was found to be 46.99 nm for Co0.75Ni0.25Fe1.95Dy0.05O4. Energy-dispersive X-ray spectrum (EDS) was confirmed the purity of the sample with good stoichiometry. The coercivity, retentivity, and saturation magnetization were estimated at 841.97 Oe, 30.95 emu g−1 and 61.80 emu g−1 respectively for Co0.75Ni0.25Fe1.95Dy0.05O4. The squareness ratio for Co0.75Ni0.25Fe1.95Dy0.05O4 nanoferrite was found to be 0.5 which is the ideal Stoner—Wohlfarth value. The experimental estimated net magnetic moment ( n B ) per formula was less than the theoretical value calculated from Neel’s two sublattice model for prepared samples.

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“…The experimental value of magnetic moment per formula i.e. Bohr magneton number was calculated by using relation [42]…”

Section: Eds Studymentioning

confidence: 99%

Structural, morphological, and magnetic study of low temperature synthesized Co_0.75Ni_0.25Fe_1.95Dy_0.05O₄ nano ferrite

Chikhale¹,

Kanade²,

Bhatia³

2021

Phys. Scr.

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“…Lately, the irradiation modification of materials is used as one of the tools for tailoring the specific property, and the effects are irreversible [15]. The irradiation affects more on the electrical properties owing to the creation of imperfections in the crystals upon irradiation [16]. The high-energy γ-radiations cause the modification of the structural parameters and by change its electrical and magnetic properties [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of γ-irradiation on AC electrical and impedance spectroscopy of Ni-Zn nano ferrites

V¹,

Alzahrani²,

Shankaramurthy³

et al. 2022

Phys. Scr.

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Herein we report the effect of γ-irradiation on AC electrical properties of Ni-Zn nanoparticles Ni1-xZnxFe2O40≤x≤1synthesized via the citrate auto-combustion technique. The X-ray diffraction (XRD), analysis of the samples revealed a decreasing trend of the crystallite size with increasing concentration of Zn2+ ion. The lattice constant was found to increases with Zn2+concentration with the highest for x=0.6. The AC-electrical behaviour of the sample were studied before and after γ-irradiation in the frequency range 1MHz-23MHz. Studies show that the dielectric constant increased up on irradiation whereas the dielectric loss and AC conductivity decline after irradiation. The dielectric relaxation changes from non-Debye to Havriliak–Negami relaxation, which is the significance of asymmetric broadness in the relaxation process. The collective AC electrical propertis signifies the radiation absorption respons.

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confidence: 99%

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

Kaur

Kumar

2021

Materials Research Foundations

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Nanotechnology, when this word comes in mind, it gives deep thought of new development in communication, medical science, intelligent transport system and many more. Ferrites nanoparticles have great significance owing to their amazing chemical and physical properties. In modern era we are developing materials for microwave applications and communication devices. Before the discovery of semiconductor memory chips, ferrites were the major form for electronic memory used in computers. Scientist have been studying and working with nanoparticles in magnetically guided drug delivery. The reactivity of material increases by the use of nanoparticles of that material. The dielectric characteristics of ferrites lean on diverse factors for instance methods of preparations and chemical composition. In various studies it has been found that their conductivity has dependence on temperature, composition and frequency. Among the various kinds of ferrites, Ni–Zn ferrites are viewed as the most adaptable ferrites as a result of their novel characteristics for applications at high frequency. The Ni-Zn ferrites are exploited as core materials in a variety of EM devices as well as have broad range of industrial applications e.g. inductors, microwave devices, power supplies, high and low frequency transformer cores, electromagnetic interference (EMI) suppressions and antenna rods. These broad ranges of applications are owing to their high resistivity, low eddy currents, high saturation magnetization, chemical stability and high Curie temperature. In view of this, the present chapter deals with the research progress on nickel-zinc ferrites in the bulk as well as nano size.

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Effect of γ-radiation on structural, morphological, magnetic and dielectric properties of Zn–Cr substituted nickel ferrite nanoparticles

Cited by 19 publications

References 49 publications

Structural, morphological, and magnetic study of low temperature synthesized Co_0.75Ni_0.25Fe_1.95Dy_0.05O₄ nano ferrite

Structural, morphological, and magnetic study of low temperature synthesized Co_0.75Ni_0.25Fe_1.95Dy_0.05O₄ nano ferrite

Effects of γ-irradiation on AC electrical and impedance spectroscopy of Ni-Zn nano ferrites

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

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Effect of γ-radiation on structural, morphological, magnetic and dielectric properties of Zn–Cr substituted nickel ferrite nanoparticles

Cited by 19 publications

References 49 publications

Structural, morphological, and magnetic study of low temperature synthesized Co0.75Ni0.25Fe1.95Dy0.05O4 nano ferrite

Structural, morphological, and magnetic study of low temperature synthesized Co0.75Ni0.25Fe1.95Dy0.05O4 nano ferrite

Effects of γ-irradiation on AC electrical and impedance spectroscopy of Ni-Zn nano ferrites

A Review on Synthesis and Characterizations of Mixed Nickel-Zinc Ferrites

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Product

Resources

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Structural, morphological, and magnetic study of low temperature synthesized Co_0.75Ni_0.25Fe_1.95Dy_0.05O₄ nano ferrite

Structural, morphological, and magnetic study of low temperature synthesized Co_0.75Ni_0.25Fe_1.95Dy_0.05O₄ nano ferrite