Synthesis of MFe 2 O 4  (M=Mg 2+ , Zn 2+ , Mn 2+ ) spinel ferrites and their structural, elastic and electron magnetic resonance properties

Prasad, Surendra; Deepty, M.; Ramesh, PD; Prasad, G.; Srinivasarao, K.; Srinivas, Ch.; Babu, K. Vijaya; Kumar, Е. Ranjith; Mohan, N. Krisha; Sastry, D.L.

doi:10.1016/j.ceramint.2018.03.070

Cited by 82 publications

(18 citation statements)

References 43 publications

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“… 10 , 15 , 27 The above orders could be discussed with consideration of ionic radii of different cations in both sites calculated according to Shannon tables 29 in tetrahedral sites: r Co 2+ = 0.58, r Ni 2+ = 0.55, r Cu 2+ = 0.57, r Mg 2+ = 0.57, r Zn 2+ = 0.60 and r Fe 3+ = 0.49 Å and in octahedral sites: r Co 2+ = 0.745, r Ni 2+ = 0.69, r Cu 2+ = 0.73, r Mg 2+ = 0.72 r Zn 2+ = 0.74 and r Fe 3+ = 0.645 Å] taking their distribution preference in both sites 1 and their atomic weights into consideration. A similar study was carried out by Prasad et al 23 for spinel ferrites prepared via a citrate sol–gel autocombustion route.…”

Section: Results and Discussionmentioning

confidence: 65%

Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

et al. 2021

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Nanocrystalline metal ferrites (MFe 2 O 4 , M = Co, Ni, Cu, Mg, and Zn) were successfully synthesized via autocombustion synthesis using egg white. X-ray diffraction (XRD) measurements revealed the crystallization of the entire ferrites either in the tetragonal structure, such as in the case of CuFe 2 O 4 , or cubic spinels such as in other studied ferrites. The Fourier transform infrared spectral study revealed the characteristic vibration bands of ferrites. Compared to other synthesis methods, the observed variation in the obtained structural parameters could be due to the different cation distribution of the prepared ferrites. In agreement with XRD measurements, the transmission electron microscopy images showed agglomerated particles with cubic morphology for all ferrites. On the other hand, CuFe 2 O 4 showed tetragonal morphology. The magnetization values were found to vary with the type of the metal ion, and CoFe 2 O 4 showed the highest one (42.8 emu/g). Generally, the lower magnetization values obtained than those reported in the literature for all studied ferrites could be attributed to the smaller particle sizes or the cation redistribution. The obtained coercivity values are observed to be higher than their related values in the literature, exhibiting the impact of the present synthesis route. Ac-conductivity as a function of temperature and frequency indicated semiconducting properties with the observed change in the conduction mechanism by increasing the temperature. The obtained low dielectric constant values could suggest using the entire ferrites in high-frequency applications such as microwave devices.

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Section: Results and Discussionmentioning

confidence: 65%

Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

et al. 2021

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“…The resonance field decreases whereas g-value increases in Cr 3+ substituted ferrite system this is due to the isotropic alignment of magnetic moments with substituted ions. The g-value gives information regarding the molecular motion, the paramagnetic properties and the symmetry of ions [29,30]. 3.9 Vibrating Sample Magnetometer (VSM) Fig.…”

Section: Esr Studiesmentioning

confidence: 99%

Structural, Dielectric and Magnetic Properties of Al3+ and Cr3+ Substituted Ni-Zn-Cu Ferrites

Satyanarayana¹,

Rao²,

Babu³

2018

JNST

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Ferrite materials with the general formula Ni0.7Zn0.2Cu0.1Fe1.9M0.1O4 (M=Al and Cr) are synthesized by using the solid state reaction method. X-ray diffraction (XRD), Fourier transforms infrared (FTIR) spectra, scanning electron microscope (SEM) dielectric measurements and vibrating sample magnetometer (VSM) techniques are utilized to study the various properties of the synthesized ferrites. XRD analysis confirmed the formation of single phase cubic spinel structure and the crystallite size is calculated by Scherrer’s formula found to be 20.3 and 12.5 nm. The magnetic properties were studied using pulse field hysteresis loop technique at room temperature. The saturation magnetization exhibit 98.71 and 91.69 emu/g for Al3+ and Cr3+ substituted Ni-Zn-Cu ferrites respectively. The magnetic permeability is increasing for chromium substituted compound in the frequency range 100 Hz to 120 MHz and significant modification in DC conductivity is explained on the basis of hopping mechanism.

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“…The sol-gel technique is the utmost adaptable process to produce synthetic nanoparticles of spinel ferrites and having uncountable benefits over other synthesis methods for instance; requires low temperature, ecofriendly, desired nanoarchitecture, chemically stable product formation with desired morphology through modification of synthesis environments and parameters [22][23][24]. The doping of variability of divalent, trivalent and tetravalent cations (Mg 2+ , Zn 2+ , Cd 2+ , Cu 2+ , Cr 3+ , Ga 3+ , Zr 4+ , Sn 4+ , Ti 4+ ) with different molar compositions are another crucial factor that has an effect on physico-chemical properties of spinel ferrite nanoparticles [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Sol–gel auto-ignition fabrication of Gd3+ incorporated Ni0.5Co0.5Fe2O4 multifunctional spinel ferrite nanocrystals and its impact on structural, optical and magnetic properties

Pawar¹,

Khirade

Vinayak³

et al. 2020

SN Appl. Sci.

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Monophasic nanocrystals of rare earth gadolinium (Gd 3+) ion doped nickel-cobalt ferrite, Ni 0.5 Co 0.5 Gd y Fe 2−y O 4 (y = 0.00, 0.025, 0.050, 0.075, 0.100 and 0.125) have been synthesized by l-ascorbic acid assisted sol-gel auto-ignition process. Thermogravimetric and differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) with selected area electron diffraction (SAED) patterns, ultraviolet-visible spectrophotometry and vibrating sample magnetometer were employed to characterize the microstructure, optical and magnetic properties. Structural investigations verified the presence of cubic spinel phase short of any contamination peak. The average crystallite size was seen in nano-regime dimensions and well confirmed by TEM results. SAED patterns showed bright and intense ring of (311) plane revealed the establishment of spinel ferrite nanocrystals. Lattice constant (a) increases steadily with the rise in Gd 3+ content following the Vegard's law. FTIR spectra confirmed the creation of spinel ferrite structural geometry. Saturation magnetization (M s) and a remanence magnetization (M r) decreased from 29.77 to 20.78 emu/g and 21.62 to 15.79 emu/g, respectively, with increasing the Gd 3+ content. However, coercivity (H c) is significantly increased. The highest value of H c = 1132 Oe was found for y = 0.075 sample. The reduction in M s values can be justified owing to the replacement of Fe 3+ existing at the octahedral [B]-sites by the Gd 3+ ions which is paramagnetic at room temperature. The elucidation of magnetic parameters with Gd 3+ doping was attributed to the discrepancy of anisotropy constant, the paramagnetic nature of Gd 3+ and crystallite size effect.

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Synthesis of MFe 2 O 4 (M=Mg 2+ , Zn 2+ , Mn 2+ ) spinel ferrites and their structural, elastic and electron magnetic resonance properties

Cited by 82 publications

References 43 publications

Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

Structural, Dielectric and Magnetic Properties of Al3+ and Cr3+ Substituted Ni-Zn-Cu Ferrites

Sol–gel auto-ignition fabrication of Gd3+ incorporated Ni0.5Co0.5Fe2O4 multifunctional spinel ferrite nanocrystals and its impact on structural, optical and magnetic properties

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Synthesis of MFe 2 O 4 (M=Mg 2+ , Zn 2+ , Mn 2+ ) spinel ferrites and their structural, elastic and electron magnetic resonance properties

Cited by 82 publications

References 43 publications

Structural and Magnetoelectrical Properties of MFe2O4 (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

Structural and Magnetoelectrical Properties of MFe2O4 (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

Structural, Dielectric and Magnetic Properties of Al3+ and Cr3+ Substituted Ni-Zn-Cu Ferrites

Sol–gel auto-ignition fabrication of Gd3+ incorporated Ni0.5Co0.5Fe2O4 multifunctional spinel ferrite nanocrystals and its impact on structural, optical and magnetic properties

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Product

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Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate

Structural and Magnetoelectrical Properties of MFe₂O₄ (M = Co, Ni, Cu, Mg, and Zn) Ferrospinels Synthesized via an Egg-White Biotemplate