Synthesis and properties of Pr-substituted MgZn ferrites for core materials and high frequency applications

Mukhtar, Muhammad Waqas; Irfan, M.; Ahmad, Ishtiaq; Ali, Ihsan; Akhtar, Majid Niaz; Khan, Muhammad Azhar; Abbas, Ghazanfar; Rana, M.U.; Ali, Akbar; Ahmad, Mahmood

doi:10.1016/j.jmmm.2014.12.072

Cited by 44 publications

(9 citation statements)

References 26 publications

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“…The investigation of magnetic properties confirmed that Mg-Zn ferrites are soft magnetic materials with high magnetic permeability and near to zero values for coercivity H c (Figure 4). That is in concordance with results reported in the literature [21,32,[37][38][39][40].…”

Section: Magnetic Propertiessupporting

confidence: 93%

The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite

Petrila

Tudorache

2021

Materials

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This paper presents the results of an investigation on the magnetic and dielectric properties of Mg0.5Zn0.5Fe2O4 spinel ferrite with a 1% weight percentage of Li+ and K+ added cations. The addition of metal ions plays an important role in increasing the porosity and favors the formation of ferrite at low temperatures. The goal of this new research is to demonstrate that by selecting the type of metallic cations for addition or choosing an optimal sintering temperature, it may be possible to improve the magnetic and electrical properties of Mg-Zn ferrite. The samples were prepared using sol-gel self-combustion techniques and annealed at 1000°C, 1100°C, and 1200°C. Scanning electron microscopy revealed the shape and grain size of the samples, and the phase composition was analyzed using the X-Ray diffraction technique. The magnetic information, such as remanent magnetization MR, saturation magnetization MS, and coercivity HC, were extracted from the hysteresis loops of the samples. The electrical investigation was focused on the low- and high-frequency dependence of dielectric constant and dielectric losses. The results are discussed in terms of microstructural changes induced by the additions of Li+ and K+ metallic cations. Conclusions are drawn concerning the optimization of magnetic and electrical properties for the development of Mg-Zn ferrite with possible applications in the field of magnetic materials or electronics.

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Section: Magnetic Propertiessupporting

confidence: 93%

The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite

Petrila

Tudorache

2021

Materials

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“…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.…”

Section: Introductionmentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

“…The effect of Cr 3+ substitution in the Mg-Zn ferrite has been studied by Haralkar et al [42] and Xia et al [43]; they have reported on the decrease of M s with Cr contents. Mukhtar et al [48] have investigated the Pr substituted Mg-Zn ferrites where the samples are characterized by XRD, FTIR spectroscope, SEM, EDX and VSM measurements. The decrease in M s and increase in coercive field (H c ) has been reported with increase in Pr contents.…”

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confidence: 99%

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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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“…The physical properties of different ions substituted Mg-Zn have been investigated by many researchers: Mn [2,3,21], Sm [11], Ti [22], Nd [23,24], Zr [25], Cu [26][27][28][29], Cr [30][31][32], Co [33,34], Pr [35], Gd [36], Ni [37,38] of which some of them were dealt with electrical and dielectric properties [3,11,21,22,26,29,32,38] and some of them were dealt with magnetic properties [2,25,28,31,[34][35][36][37] of substituted Mg-Zn ferrites. Few of them were also dealt with both of dielectric and magnetic properties [27,30,33].…”

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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Synthesis and properties of Pr-substituted MgZn ferrites for core materials and high frequency applications

Cited by 44 publications

References 26 publications

The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite

The Influence of Li+ and K+ Added Cations and Annealing Temperature on the Magnetic and Dielectric Properties of Mg-Zn Ferrite

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

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

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