Effect of Mn 2+ substitution on structural, electrical transport and dielectric properties of Mg-Zn ferrites

Ghodake, U. R.; Kambale, Rahul C.; Suryavanshi, S.S.

doi:10.1016/j.ceramint.2016.10.053

Cited by 76 publications

(20 citation statements)

References 37 publications

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“…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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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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“…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 3 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: 99%

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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“…In addition, determination of band gap of semiconducting materials is very important for their practical application. Therefore, the present paper reports the investigation of mechanical properties, high temperature magnetic properties along with FTIR spectra and UV-vis measurement of Mg-Zn ferrites.Mg-Zn ferrites have been subjected by a large number of research group to modify the different properties using different synthesis routes and conditions [12,14,[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49], where some of them are dealt with tailoring electrical properties and/or magnetic properties of Mg-Zn ferrites. The motivation of our present research is to enhance the electrical resistivity of the Mg-Zn ferrites by Y 3+ substitution for Fe 3+ with favorable magnetic properties that is one of the significant characteristics of ferrites for applications in high frequency devices.…”

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confidence: 99%

Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg–Zn ferrites

Ali

Khan

Hossain

et al. 2020

Mater. Res. Express

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We report the synthesis of Y-substituted Mg-Zn [Mg 0.5 Zn 0.5 Y x Fe 2−x O 4 (0x0.05)] ferrites using conventional standard ceramic technique. The samples were characterized by x-ray diffraction (XRD) analysis, field emission scanning electron microscopy (FESEM), FTIR spectroscopy, UV-Vis spectroscopy and quantum design physical properties measurement system (PPMS). XRD patterns confirm the single phase cubic spinel structure up to x=0.03 and appearance of a secondary phase of YFeO 3 for higher Y contents. FESEM images depict the distribution of grains and EDS spectra confirmed the absence of any unwanted element. Completion of solid state reaction and formation of spinel structure has been revealed from FTIR spectra. The FTIR data along with lattice constant, bulk density and porosity were further used to calculate the stiffness constant (C ij ), elastic constant and Debye temperatures. Mechanical stability of all studied compositions is confirmed from C ij using Born stability conditions. Brittleness and isotropic nature are also confirmed using Poisson's ratio and anisotropy constants, respectively. The enhancement of dc electrical resistivity (10 5 Ω cm to 10 6 Ω cm) with Y content is observed. The energy band gap (increased with Y contents) is found in good agreement with dc electrical resistivity. Ferrimagnetic to paramagnetic phase change has been observed from the field dependent high temperature magnetization curves. The magnetic moments and saturation magnetization were found to be decreased with increasing temperature. The Curie temperature (T c ) has been measured from temperature dependent magnetic moment (M-T) and initial permeability (μ′ i -T) measurements and found to be in good agreement with each other. Decrease in T c with Y content is due to redistribution of cations and weakening of the exchange coupling constant. The magnetic phase transition has been analyzed by Arrott plot and found to have second order phase transition. The dc resistivity endorses the prepared ferrites are suitable for high frequency and high temperature magnetic device applications as well.Mg-Zn ferrite is one of the most used soft ferrites because of its high electrical resistivity, low cost, low dielectric loss, high mechanical hardness and superior environmental stability [13]. Mg-Zn ferrites with higher resistivity (10 6 -10 7 Ω cm) make its suitability in high frequency applications [13]. Most of (∼ 90%) Mg 2+ ions are located on the B-sites and small fraction (∼10%) occupies in the A-sites [14,15]. However, the Zn 2+ ions have a preference to occupy A-sites in the spinel lattice [16,17]. The Fe 3+ ions are distributed on both A-and B-sites [18]. Therefore, the physical properties of the Mg-Zn ferrites are determined by the cations distribution over the A-and B-sites. The physical properties can be altered by introducing the different metallic ions results the cations distribution modification on the A-and B-sites. The factors that determine cation distributions are ionic radius, charge, site preference and le...

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Effect of Mn 2+ substitution on structural, electrical transport and dielectric properties of Mg-Zn ferrites

Cited by 76 publications

References 37 publications

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

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

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

Mechanical behavior, enhanced dc resistivity, energy band gap and high temperature magnetic properties of Y-substituted Mg–Zn ferrites

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