Effect of non-magnetic ions substitution on the structure and magnetic properties of Y3−xSrxFe5−xZrxO12 nanoparticles

Mahmoudi, S.; Gholizadeh, Ahmad

doi:10.1016/j.jmmm.2018.02.017

Cited by 38 publications

(4 citation statements)

References 37 publications

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“…In the last few years several researches are carried out on magnetic nanoparticles to increase the potential of applications in this field by improving their physical properties for several industrial and technological applications. Between these, soft ferromagnetic materials are commonly used in both DC and AC applications such as electromagnets, relays, transformers, motors, generators, inductors, antenna rods, microwave isolators, phase shifters and filters [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Crystal Structure, Electrical and Magnetic Properties of Spinel Mn-Cd Ferrite Nanoparticles

Abouhaswa

Badr

Nasr

et al. 2021

J Inorg Organomet Polym

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Fe 2 Cd 1-x Mn x O 4 (x= 0, 0.25, 0.5, 0.75, 1) spinel ferrite nanoparticle samples were synthesized using a flash auto-combustion technique and analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). The inspection of dielectric and magnetic properties of the prepared ferrites was carried out by using broadband dielectric spectroscopy (BDS) and vibration sample magnetometer (VSM) measurements, respectively. Xray diffraction analysis verified the formation of the main cubic phase with space group Fd3m and a decrease in lattice constants with the increase in Mn-content.FTIR study revealed the two characteristic absorption bands of spinel ferrites and their dependence on Mn-content was investigated and explained. Elastic moduli such as Longitudinal, transverse and mean elastic wave velocities (𝑉 𝑙 , 𝑉 𝑡 𝑉 𝑚 ), bulk modulus (𝐵), rigidity modulus (𝐺), Young modulus (𝐸) and calculated Debye temperature ( D ) have been studied and found to decrease with the increase in Mncontent. SEM analysis revealed nanoparticles agglomeration of uniform grains with increasing in the average grain size as Mn-content increased. The VSM measurements showed an increase in saturation magnetization (M s ) accompanied by a decrease in coercivity (H c ) as Mn-content increased. Dielectric investigations showed very high values of permittivity and dielectric loss at lower frequencies reflecting the combination of exchange of electrons between ferrous and ferric ions and ions' transport. The ac-conductivity showed a plateau that yields the dcconductivity (σ dc ) at lower frequencies followed by a characteristic frequency (ν c ) at which it tends out to follow a power law. The relation between these two parameters confirms the empirical BNN-relation.

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Section: Introductionmentioning

confidence: 99%

Investigation of Crystal Structure, Electrical and Magnetic Properties of Spinel Mn-Cd Ferrite Nanoparticles

Abouhaswa

Badr

Nasr

et al. 2021

J Inorg Organomet Polym

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“…As can be seen, the surface morphology of the samples consists of ordered grains composed of smaller nanoparticles with an unequal size that are distributed throughout the samples with small porosity. A particle size distribution diagram of the samples was drawn and the mean particle size (D FESEM ) was obtained using fitting the particle size distribution histogram with the lognormal distribution function (Mahmoudi and Gholizadeh, 2018).…”

Section: Fesem Images and Edx Analysismentioning

confidence: 99%

Cadmium Substitution Effect on Microstructure and Magnetic Properties of Mg-Cu-Zn Ferrites

2022

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The microstructure, optical, and magnetic properties of CdxMg0.3-xCu0.2Zn0.5Fe2O4 ferrites prepared by the citrate auto-combustion method were investigated. The samples were analyzed by X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, https://soh.iums.ac.ir/uploads/uv-vis_-_2.pptx X-ray energy-dispersive spectroscopy, Fourier-transform infrared spectroscopy, and vibrating sample magnetometer. Rietveld refinement of XRD patterns shows a single-phase cubic structure (space group Fd3¯m) for the samples with x up to 0.20, while the impurity phase of CdO is observed in the samples with x = 0.25, 0.30. As the substitution content increases, the presence of non-magnetic Cd2+ ions in the octahedral site and the migration of Fe3+ions from the octahedral site to the tetrahedral site decreases the saturation magnetization of the samples. Comparison of the bandgap energy of the samples shows an increasing trend with Cd substitution for x up to 0.20 and then decreases, which can be interpreted in terms of changes in the electronic structure of the samples. Improvement in dielectric properties of the samples with increase of Cd2+ content for x up to 0.20 may be attributed to easier transfer and electron exchange between Fe3+and M2+ ions.

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“…The q XRD can be calculated by the following relation (Mahmoudi and Gholizadeh 2018;Gholizadeh 2018):…”

Section: Characterization Of the Catalystmentioning

confidence: 99%

Comparing Catalytic Activity of MgMnO3 and SrMnO3 Nanocatalyst for Synthesis of Polyhydroquinoline and New Derivatives via Hantzsch Reaction

Soleimani

Salehi

Gholizadeh

2020

Iran J Sci Technol Trans Sci

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Spinel-type oxide MgMnO 3 and perovskite-type oxide SrMnO 3 have been synthesized by two-step procedures comprising the hydrothermal and solid-state methods. The as-prepared catalysts were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and the morphologies of the synthesized materials were figured out by field emission scanning electron microscopy. The catalytic performance of synthesized materials were investigated by synthesizing the polyhydroquinolines, which was used Design-Expert software and response surface methodology (central composite design) for optimization of reaction efficiently. The comparison study illustrates that MgMnO 3 has better catalytic performance than SrMnO 3 and optimized condition for the synthesis of polyhydroquinoline (which is produced by the reaction of ethyl acetoacetate, benzaldehyde, dimedone and ammonium acetate) was found to be 8 mg of MgMnO 3 as the catalyst, 33 min for the reaction time and 100°C for the reaction temperature. This condition was used for the synthesis of other polyhydroquinoline derivatives.

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Effect of non-magnetic ions substitution on the structure and magnetic properties of Y3−xSrxFe5−xZrxO12 nanoparticles

Cited by 38 publications

References 37 publications

Investigation of Crystal Structure, Electrical and Magnetic Properties of Spinel Mn-Cd Ferrite Nanoparticles

Investigation of Crystal Structure, Electrical and Magnetic Properties of Spinel Mn-Cd Ferrite Nanoparticles

Cadmium Substitution Effect on Microstructure and Magnetic Properties of Mg-Cu-Zn Ferrites

Comparing Catalytic Activity of MgMnO3 and SrMnO3 Nanocatalyst for Synthesis of Polyhydroquinoline and New Derivatives via Hantzsch Reaction

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