Investigations on structural, electrical and dielectric properties of yttrium substituted Mg-ferrites

Ishaque, M.; Khan, Muhammad Azhar; Ali, Irshad; Khan, Hasan M.; Iqbal, Mazhar; Islam, M.U.; Warsi, Muhammad Farooq

doi:10.1016/j.ceramint.2014.11.093

Cited by 35 publications

(20 citation statements)

References 26 publications

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“…Therefore, increase of electrical resistivity is expected by Y 3+ substitution for Fe 3+ in Mg-Zn ferrites due to its (Y 3+ ) tendency to occupy the B-site due to larger ionic radius [13]. It is noted that the Yttrium (Y) has already been substituted in Ni-Zn ferrites, Mg ferrites and Co ferrites [13][14][15][16][17][18][19][20]. Enhancement of electrical resistivity in Y substituted Ni-Zn and Mg ferrites have also been reported [16][17][18].…”

Section: Introductionmentioning

confidence: 97%

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Yttrium-substituted Mg–Zn ferrites: correlation of physical properties with Yttrium content

Ali

Khan

Chowdhury

et al. 2019

J Mater Sci: Mater Electron

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Yttrium-(Y) substituted Mg-Zn ferrites with the compositions of Mg 0.5 Zn 0. 5Y x Fe 2-x O 4 (0 ≤ x ≤ 0.05) have been synthesized by conventional standard ceramic technique. The effect of Y 3+ substitution on the structural, electrical, dielectric and magnetic properties of Mg-Zn ferrites has been studied. The single phase of spinel structure with a very tiny secondary phase of YFeO 3 for higher Y contents has been detected. The theoretically estimated lattice constant has been compared with measured experimental lattice constant. The bulk density, X-ray density and porosity have been calculated. The Energy Dispersive X-ray Spectroscopy (EDS) study confirms the presence of Mg, Zn, Y, Fe and O ions in the prepared samples. Frequency dependence of conductivity has been studied and an increase in resistivity (an order) has been observed. Frequency dependence of dielectric constant (ԑʹ), dielectric loss tangent (tanδ) has been studied and the lowering of ԑʹwith the increase of Y content was noted. Dielectric relaxation time was found to vary between 15 to 31 nano seconds. The saturation magnetization (M s ), coercive field (H c ), remanent magnetization (M r ) and Bohr magneton (µ B ) have been calculated. The variation of M s has been successfully explained with the variation of A-B interaction strength due to Y substitution. The soft ferromagnetic nature also confirmed from the values of H c . The complex permeability has been studied and the initial permeability was found to increase with Y up to x = 0.01, thereafter it decreases. The values of electrical resistivity and dielectric constant with proper magnetic properties suggest the suitability of Y-substituted Mg-Zn ferrites in microwave device applications.

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Section: Introductionmentioning

confidence: 97%

“…It is noted that the Yttrium (Y) has already been substituted in Ni-Zn ferrites, Mg ferrites and Co ferrites [13][14][15][16][17][18][19][20]. Enhancement of electrical resistivity in Y substituted Ni-Zn and Mg ferrites have also been reported [16][17][18].…”

Section: Introductionmentioning

confidence: 98%

Yttrium-substituted Mg–Zn ferrites: correlation of physical properties with Yttrium content

Ali

Khan

Chowdhury

et al. 2019

J Mater Sci: Mater Electron

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“…Magnesium ferrite with a chemical formula of MgFe 2 O 4 has an inverse spinel structure, in which half of the trivalent cations occupy the tetrahedral (A) sites and the other half of the trivalent cations and all of the divalent cations fill the octahedral (B) sites [5]. Because of easy fabrications, high efficiencies, thermal stabilities, and low costs of magnesium-ferrites have the broad in scope of applications from low frequencies to microwave frequencies (devices) [6][7]. The excellent magnetic and electrical properties such as high permeability, high electrical resistivity and low dielectric and magnetic losses these ferrites can be used to fabricate as microwave devices like circulators, insulators and phase shifters [8][9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structural, W-H plot and size-strain analysis of nano cobalt doped MgFe2O4 ferrite

Vishwaroop

Mathad²

2020

Sci Sintering

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In this study we have investigated structural attribute of Co+2 doped MgFe2O4. Synthesis of Mg1-xCoxFe2O4 ferrite was carried out using co-precipitation method. The formation of spinal ferrite was confirmed through X-ray diffraction. Lattice parameter found to be 8.376748 ? and crystallite sizes in the range 180-365 ? are observed. Various parameters like dislocation density (?D); mechanical properties (strain), Hopping length {tetrahedral site (LA) and octahedral site (LB)}, Bond length (A-O and B-O), and Ionic radii (rA and rB) were reported. The W-H plot and Size-Strain plots were extensively studied and the results have been correlated.

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“…(Shinde et al, 2010;Köseoğlu et al, 2012;Ciocarlan et al, 2016;Safi et al, 2016;Sutka and Gross, 2016;Şaşmaz Kuru and Şentürk, 2016). Ferrites has also been studied because of their high dielectric constant, high magnetic permeability, very low dielectric loss over a wide frequency range and remarkable chemical stability (Ishaque et al, 2015;Pawar et al, 2016;Mazen and Abu-Elsaad, 2017). In order to use electrical transport and dielectric properties in high frequency applications, real part of dielectric function (ε′), imaginary part of dielectric function (ε", dielectric loss), dielectric loss tangent (tanδ) and AC electrical conductivity (σac) parameters should be examined.…”

Section: Introductionmentioning

confidence: 99%

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

Kuru

2021

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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In this study, structural, morphological, dielectric and AC conductivity properties of CoMgLa ferrite samples (Co0.5Mg0.5LaxFe2-xO4) were investigated according to the change of x (x=0, 0.1, 0.2, 0.3, 0.4 and 0.5). Samples were synthesized by co-precipitation method. The structural properties were examined using XRD and results show that the prepared sample crystallizes in the cubic spinel structure. Crystallite sizes are changing between 24.92 to 9.80 nm. Morphological and elemental properties were analyzed by SEM and EDX. Dielectric properties were investigated by impedance spectroscopy. The samples showed normal dielectric properties consistent with the Maxwell-Wagner model due to interfacial polarization. When the impedance characteristics were examined, it was found that the relaxation process was compatible with the Cole-Cole model. The results of the modulus show that grains contribute to the relaxation process as well as grain boundaries. AC conductivity exhibited semiconductor behavior. The constant behavior of conductivity at low frequencies is a sign that the examined samples may be suitable for many applications.

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Investigations on structural, electrical and dielectric properties of yttrium substituted Mg-ferrites

Cited by 35 publications

References 26 publications

Yttrium-substituted Mg–Zn ferrites: correlation of physical properties with Yttrium content

Yttrium-substituted Mg–Zn ferrites: correlation of physical properties with Yttrium content

Synthesis, structural, W-H plot and size-strain analysis of nano cobalt doped MgFe2O4 ferrite

Frequency Dependence of Dielectric, Conductivity, Impedance and Electrical Modulus Properties of La3+ Substituted in Cobalt- Magnesium Ferrites

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