X-ray diffraction analysis for the determination of elastic properties of zinc-doped manganese spinel ferrite nanocrystals (Mn0.75Zn0.25Fe2O4), along with the determination of ionic radii, bond lengths, and hopping lengths

Debnath, Simi; Deb, K. K.; Saha, Biswajit; Das, Ratan

doi:10.1016/j.jpcs.2019.05.047

Cited by 69 publications

(18 citation statements)

References 83 publications

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“…The O-H in the plane and out of plane bond appears at 1626 cm −1 to 1631 cm −1 , respectively. The presence of H 2 O absorption bands in and out of the plane and metal-oxygen bonds confirms the existence of Ni and Cu in the synthesized samples [36,37].…”

Section: Ftirsupporting

confidence: 64%

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

et al. 2021

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Herein, we report the synthesis of nanoparticles and doping of Cu-doped Co–Zn ferrites using the auto-combustion sol–gel synthesis technique. X-ray diffraction studies confirmed the single-phase structure of the samples with space group Fd3m and crystallite size in the range of 20.57–32.69 nm. Transmission electron microscopy micrographs and selected area electron diffraction patterns confirmed the polycrystalline nature of the ferrite nanoparticles. Energy-dispersive X-ray spectroscopy revealed the elemental composition in the absence of any impurity phases. Fourier-transform infrared studies showed the presence of two prominent peaks at approximately 420 cm−1 and 580 cm−1, showing metal–oxygen stretching and the formation of ferrite composite. X-ray photoelectron spectroscopy was employed to determine the oxidation states of Fe, Co, Zn, and Cu and O vacancies based on which cationic distributions at tetrahedral and octahedral sites are proposed. Dielectric spectroscopy showed that the samples exhibit Maxwell–Wagner interfacial polarization, which decreases as the frequency of the applied field increases. The dielectric loss of the samples was less than 1, confirming that the samples can be used for the fabrication of multilayer inductor chips. The ac conductivity of the samples increased with increasing doping and with frequency, and this has been explained by the hopping model. The hysteresis loops revealed that coercivity decreases slightly with doping, while the highest saturation magnetization of 55.61 emu/g was obtained when x = 0.1. The magnetic anisotropic constant was found to be less than 0.5, which suggests that the samples exhibit uniaxial anisotropy rather than cubic anisotropy. The squareness ratio indicates that the samples are useful in high-frequency applications.

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Section: Ftirsupporting

confidence: 64%

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

et al. 2021

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“…Comparative analysis of recorded X-ray diffractograms (Figure 1) emphasized the spinel structure-cubic phase of each sample: reference, Li + and K + samples. Diffraction lines belonging to the spinel phase are identified, the highest intensity peak (311) is present at 2θ =36°, and all diffractograms have confirmed the single-phase character of samples, similar to ones reported in the literature [32,33,34,35]. We also observed that increasing the annealing temperature allowed the decrease of the porosity of the samples.…”

Section: Microstructural Characterizationsupporting

confidence: 86%

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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“…To the best of our knowledge, there has been no previous report of the ionic radius of the manganese(III) ion. However, the ionic radius of manganese(II) has been reported in crystal systems to be 0.675 Å when surrounded with octahedral oxygen atoms . Earlier, Zipare et al have reported the value of 0.664 Å for the ionic radius of octahedral manganese(II) surrounded by oxygen atoms in a crystal system.…”

Section: Results and Discussionmentioning

confidence: 99%

Solvation of Manganese(III) Ion in Water and in Ammonia

Malloum

Conradie

2023

J. Phys. Chem. A

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In this work, we have studied the solvation of manganese(III) ion in water and in ammonia using three levels of theory: MP2, MN15, and ωB97XD associated with the aug-cc-pVDZ basis set. The studied systems are constituted of Mn3+(H2O)6 and Mn3+(NH3)6 in gas and solvent phases as well as Mn3+(H2O)18 and Mn3+(NH3)18 in the gas phase. Four aspects of the solvation of manganese(III) ion have been examined for the aforementioned systems at the three levels of theory. First, we started by locating the Jahn–Teller elongated and compressed configuration in Mn3+(H2O)6 and Mn3+(NH3)6. Second, we calculated the spin state energies and the spin state free energies for temperatures ranging from 50 to 400 K to look at possible spin crossover in the studied systems. Third, we carried out a quantum theory of atoms in molecules (QTAIM) analysis, and we determined the ionic radii of manganese(III) ion in water and in ammonia. Fourth, we calculated the solvation free energies and the solvation enthalpies of manganese(III) ion in water and in ammonia using the cluster continuum solvation model. For these four aspects of the solvation of manganese(III) ion, most of the reported properties are provided in this work for the first time. We particularly found that the calculated solvation enthalpy of the manganese(III) ion in water is in good agreement with an experimental estimate.

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X-ray diffraction analysis for the determination of elastic properties of zinc-doped manganese spinel ferrite nanocrystals (Mn0.75Zn0.25Fe2O4), along with the determination of ionic radii, bond lengths, and hopping lengths

Cited by 69 publications

References 83 publications

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications

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

Solvation of Manganese(III) Ion in Water and in Ammonia

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