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

Kavitha, Nowroji; Manohar, P.

doi:10.1007/s10948-016-3524-0

Cited by 21 publications

(6 citation statements)

References 31 publications

(26 reference statements)

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“…At lower frequencies, the energy required to overcome high-resistive grain boundaries was greater, leading to an increase in the loss factor. At higher frequencies, the energy necessary for electron transfer between ferric and ferrous ions is reduced within the grain, resulting in a decrease in energy loss [13].…”

Section: Frequency Dependencementioning

confidence: 99%

“…Less-resistive grains are what cause increased conductivity at high frequencies [41]. The number of electrons participating in the hopping mechanism increases with increasing field frequency, which contributes to an increase in AC conductivity [13].…”

Section: Ac Conductivitymentioning

confidence: 99%

“…The substitution of Ni 2+ ions by Mg 2+ or Co 2+ ions at the [B] sites results in a reduction in electron hopping between Fe 3+ and Fe 2+ ions. Additionally, a decrease in the concentration of Ni 2+ ions at the [B] sites leads to a decrease in hole hopping between Ni 3+ and Ni 2+ ions, ultimately resulting in a decrease in conductivity [13].…”

Section: Ac Conductivitymentioning

confidence: 99%

“…The substitution of magnesium ions, which are nonmagnetic, and cobalt ions, which are magnetic, into nickelzinc ferrite has a significant impact on the regulation of its structural, electrical, and magnetic characteristics [12]. According to various studies conducted by researchers, the substitution of the Mg 2+ ion in the ferrite system results in improved properties such as increased saturation magnetization and resistivity, decreased power loss, and high thermal stability [13]. In addition, the substitution of the Co 2+ ion affects structural, electrical, and magnetic properties in the Ni-Zn ferrite system [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and investigation of structural, elastic, and electrical properties of cobalt and magnesium substituted Ni–Zn spinel ferrite nanoparticles

Hasan¹,

Azhdar

2023

J. Phys.: Condens. Matter

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The sol-gel auto-combustion approach was used to create Ni0.4M0.2Zn0.4Fe2O4 (M=Ni2+, Mg2+, and Co2+) nanoparticles. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDS), and an inductance-capacitance-resistance (LCR) meter were used to analyse the samples’ structural, elastic, and electrical properties. In all samples, the XRD patterns obtained indicated the formation of a monophasic cubic spinel structure with no identifiable impurity phase, which was supported by EDS investigations. The introduction of substituting ions, specifically Mg2+ and Co2+, into Ni-Zn ferrite nanoparticles results in an increase in the lattice parameter. The lattice parameter for Ni-Zn is 8.377Ao, while for the substituted nanoparticles it is 8.389 and 8.388 Ao for Mg2+ and Co2+ respectively. Additionally, the crystallite size of the substituted nanoparticles increases to 46.57 nm from 40.75 nm for Ni-Zn. However, the X-ray density of the substituted nanoparticles decreases to 5.180 and 5.337 g/cm3 for Mg2+ and Co2+ respectively, from 5.358 g/cm3 for Ni-Zn. The elastic parameters, such as the Young's modulus, Debye temperature, bulk modulus, and rigidity modulus, were calculated. The good elastic characteristics of Ni-Zn ferrite were confirmed and may be explained by the lower lattice parameter values and smaller crystallite sizes. Temperature and frequency effects on dielectric behaviour and AC electrical conductivity (σAC) were investigated. At ambient temperature, the dielectric characteristics, specifically the dielectric constant (ε') and loss tangent (tanδ), were computed over a frequency range of 100 Hz to 2 MHz. The compositions display normal dielectric properties, which are attributed to the interfacial polarisation following the Maxwell-Wagner model. The AC conductivity of nanoparticles was shown to decrease when Mg2+ and Co2+ were substituted into Ni-Zn ferrite. Furthermore, the AC conductivity diminishes with decreasing frequency, which is a sign of ionic conductivity. There was a direct relationship between the temperature and the values of ε', tanδ, and σAC for different ions.

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Section: Frequency Dependencementioning

confidence: 99%

Section: Ac Conductivitymentioning

confidence: 99%

Section: Ac Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and investigation of structural, elastic, and electrical properties of cobalt and magnesium substituted Ni–Zn spinel ferrite nanoparticles

Hasan¹,

Azhdar

2023

J. Phys.: Condens. Matter

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“…Babu [32] has studied the effect of Mg substitution on the structural and magnetic properties of Ni0.3Zn0.7−xMgxFe2O4 (x varying from 0.00 to 0.25 in steps of 0.05) ferrite prepared by the conventional solid-state method. Kavitha et al [33] studied the magnetic and electrical properties of Ni0.80−xMgxZn0.20Fe2O4 (x = 0, 0.10-0.50) ferrites prepared by the flash combustion method. The present work is directed to study the structural and magnetic properties of pure and Mg 2+ doped Ni0.5Zn0.5Fe2O4 nanocomposites nanocrystalline ferrites synthesized via the co-precipitation method with Oleic acid as a surfactant.…”

Section: Introductionmentioning

confidence: 99%