Sol-gel auto-combustion synthesis of Li3xMnFe2−xO4 and their characterizations

Kadam, R.H.; Biradar, A. R.; Mane, Maheshkumar L.; Shirsath, Sagar E.

doi:10.1063/1.4746746

Cited by 34 publications

(5 citation statements)

References 25 publications

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“…Comparing the coercivity of pure MnFe 2 O 4 (x = 0.0) with the literature value, 11,40 it is observed that the coercivity of the presently investigated sample shows a higher coercivity value. This may be attributed to the fact that the particle size of the presently investigated sample is smaller than the literature reported value.…”

Section: B Magnetic Propertiesmentioning

confidence: 82%

“…MnFe 2 O 4 is a ferrimagnet (T N = 560 K) having a spinel structure with two inequivalent sublattices of tetrahedral (A) and octahedral [B] symmetries for the magnetic ions sites. [11][12][13][14] Mn 2+ cation in spinel is at its high spin state. Its five 3d electrons display configurations e 2 t 2 3 and t 2g 3 e g 2 at the tetrahedral and octahedral lattice site, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Shirsath

Mane²,

Yasukawa

et al. 2014

Phys. Chem. Chem. Phys.

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151

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The present work is focused on the effect of Fe(3+) replacement by rare earth-Ho(3+) ions and their influence on the properties of MnFe2O4 ferrite. The Ho(3+) substituted MnFe2O4 ferrite samples with chemical formula MnHoxFe2-xO4 were synthesized where substitution concentration of Ho(3+) was 0.0, 0.05, 0.1 and 0.15. The samples were synthesized by the self-ignited sol-gel method using the nitrates of the respective elements. Powder X-ray diffraction, transmission electron microscopy, infrared spectroscopy, vibrating sample magnetometer (VSM) and electrical measurements were employed to characterize the structural, magnetic and electrical properties of these ferrite nanoparticles. The cations distribution between the tetrahedral (A-site) and octahedral sites (B-site) has been estimated by XRD analysis. It is found that substitution of Ho(3+) ions favorably influenced the magnetic and electrical properties. Magnetic measurements were carried out at 77 and 300 K. Saturation magnetization and coercivity increased from 54.57 to 71.6 emu g(-1) and 172 to 766 Oe, respectively, with increasing the Ho(3+) substitution. The change in magnetic properties may be explained with the increase of A-O-B (FeA(3+)-O(2-)-HoB(3+)) super exchange interactions and the anisotropy constant. The electrical properties show that the pure sample has lower resistivity with respect to any Ho(3+) doped one. The conduction mechanism is used to interpret electrical measurements. Results of the presently investigated samples with enhanced saturation magnetization, coercivity and remanence ratio indicate that the Ho(3+) doped MnFe2O4 nanoparticles can be a useful candidate for the application in high density recording media.

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Section: B Magnetic Propertiesmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Shirsath

Mane²,

Yasukawa

et al. 2014

Phys. Chem. Chem. Phys.

Self Cite

151

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“…High surface to volume ratio improves the properties of nano-sized materials in comparison with their bulk counterparts leading to increase the attention of researchers to explore the materials at nanoscale level. Magnetic oxides, in particular spinel ferrites with nano-size dimension have been comprehensively studied due their distinctive physical properties such as high magnetocrystalline anisotropy, high coercivity, very high chemical and mechanical stability, moderated saturation magnetization, low losses of eddy currents and low conductivity [1][2][3][4][5]. Such unique properties of nano-ferrites make them suitable for various medical and technological applications like waste water treatment [6], treatment for hyperthermia [7], drug delivery carriers [8], magnetic, humidity and biosensors [9][10], microwave devices, high density data storage devices, magnetic recording media, computer memory chips and high frequency devices [11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of cation distribution on structural and mechanical properties of Y³⁺ substituted Co-Zn spinel ferrites nanoparticles.

Nikam

Birajdar²,

Kadam³

et al. 2023

J. Phys.: Conf. Ser.

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Yttrium (Y3+) substituted Co-Zn spinel ferrite nanoparticles with compositional formula Co0.9Zn0.2YxFe1.9-xO4 (x = 0.0, 0.015, 0.030, 0.045, 0.06) were synthesized by using sol-gel auto-ignition route. The structural and mechanical properties of Co-Zn ferrites were tailored by the replacement of Fe3+ ions by Y3+ ions. Rietveld refined X-ray diffraction patterns of all the samples confirm the cubic spinel structure. Lattice parameter increases with the substitution of Y3+ ions which may be due to the difference in ionic radii. The crystallite size obtained from XRD analysis is found in the nanometer range of 16.8 – 24.7 nm. Distribution of cations over tetrahedral – A and octahedral – B sites have been studied by using X-ray diffraction data and it is found that Y3+ ions prefers the octahedral – B site. Infrared spectra of all the samples were recorded in the wave number range of 300 cm−1 to 800 cm−1 which shows splitting of the two fundamental absorption bands. Two absorption bands (ν1 and ν2) observed in the range 380 – 610 cm−1 are belongs to tetrahedral – A and octahedral – B interstitial sites. The force constants (KO and Kt) and corresponding elastic parameters were determined by using IR data. The stiffness constant (C11), Young’s modulus (E), rigidity modulus (G), bulk modulus (B) and Debye temperature (θD) were found increases with the addition of Y3+ ions.

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“…Due to high chemical stability, considerable magnetic permeability and high electrical resistivity make these materials suitable for several industrial applications. [ 1–5 ] It is well known that intrinsic properties of ferrites like magnetic saturation, Curie temperature, dielectric losses, and d.c. electrical resistivity are greatly influenced by chemical composition, sintering conditions, type of impurity substitution, and site occupancy by metal cations, etc. [ 6–8 ] These unique properties of spinel ferrites make them favorable candidate for variety of technological applications such as magnetic recording media, magnetic drug delivery system, data storage, biosensors, hyperthermia treatment, magnetic refrigeration, etc.…”

Section: Introductionmentioning

confidence: 99%

Complete Micro‐Structural Analysis and Elastic Properties of Sm³⁺‐Doped Ni‐Mn‐Zn Mixed Spinel Ferrite Nanoparticles

More¹,

Kadam

Kadam³

et al. 2021

Macromolecular Symposia

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A series of Ni‐Mn‐Zn mixed spinel ferrite doped with Sm3+ ions is prepared by using sol‐gel auto‐combustion technique. Single phase cubic spinel structure of all the samples is confirmed by using XRD analysis. Incorporation of Sm3+ ions in Ni‐Mn‐Zn ferrites increases the lattice parameter from 8.4105 to 8.4134 Å. Williamson – Hall (W‐H) and strain size plot (SSP) analysis confirms the tensile‐type strain induced in the crystal lattice, which increases with the addition of Sm3+ ions. Average crystallite size estimated from Scherrer equation is found in the range 21.7–24.9 nm, which in good agreement with the results obtained from W‐H and SSP analysis. Infrared spectra recorded in the range 350–800 cm−1 reveals the characteristic features of spinel ferrites. Higher frequency band ν1 is observed near 580 cm−1 and lower frequency band ν2 is observed near 380 cm−1. By using the IR data, elastic constant (stiffness constant) and elastic moduli (Young's modulus, bulk modulus, and rigidity modulus) are estimated. Debye temperature obtained from Anderson formula ranging from 535 to 562 K and from Waldron equation ranging from 676 to 713 K with the substitution of Sm3+ ions.

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Sol-gel auto-combustion synthesis of Li3xMnFe2−xO4 and their characterizations

Abstract: Articles you may be interested inStructural and ambient/sub-ambient temperature magnetic properties of Er-substituted cobalt-ferrites synthesized by sol-gel assisted auto-combustion method

Cited by 34 publications

References 25 publications

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Effect of cation distribution on structural and mechanical properties of Y³⁺ substituted Co-Zn spinel ferrites nanoparticles.

Complete Micro‐Structural Analysis and Elastic Properties of Sm³⁺‐Doped Ni‐Mn‐Zn Mixed Spinel Ferrite Nanoparticles

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Sol-gel auto-combustion synthesis of Li3xMnFe2−xO4 and their characterizations

Abstract: Articles you may be interested inStructural and ambient/sub-ambient temperature magnetic properties of Er-substituted cobalt-ferrites synthesized by sol-gel assisted auto-combustion method

Cited by 34 publications

References 25 publications

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho3+–Mn2+–Fe3+–O2−ferromagnetic nanoparticles

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho3+–Mn2+–Fe3+–O2−ferromagnetic nanoparticles

Effect of cation distribution on structural and mechanical properties of Y3+ substituted Co-Zn spinel ferrites nanoparticles.

Complete Micro‐Structural Analysis and Elastic Properties of Sm3+‐Doped Ni‐Mn‐Zn Mixed Spinel Ferrite Nanoparticles

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Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Self-ignited high temperature synthesis and enhanced super-exchange interactions of Ho³⁺–Mn²⁺–Fe³⁺–O²⁻ferromagnetic nanoparticles

Effect of cation distribution on structural and mechanical properties of Y³⁺ substituted Co-Zn spinel ferrites nanoparticles.

Complete Micro‐Structural Analysis and Elastic Properties of Sm³⁺‐Doped Ni‐Mn‐Zn Mixed Spinel Ferrite Nanoparticles