Synthesis and characterization of NiFe2O4 ferrite: Sol–gel and hydrothermal synthesis routes effect on magnetic, structural and dielectric characteristics

Majid, Farzana; Rauf, Javeria; Ata, Sadia; Bibi, Ismat; Malik, Abdul; Ibrahim, Sobhy M.; Ali, Adnan; Iqbal, Munawar

doi:10.1016/j.matchemphys.2020.123888

Cited by 100 publications

(55 citation statements)

References 30 publications

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“…Conversely, in our study, the increase of M R with the particle size was observed not only for CFO but also for the other studied ferrites. The high Ms and low H c of NiFe 2 O 4 was attributed to high crystallinity and uniform morphology by Majid et al [ 20 ]. The H c variation with particle size could be the consequence of the domain structure, critical diameter, and anisotropy of the crystals [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

“…The crystallite size is an important parameter to tailor the magnetic and optical properties of ferrites [4][5][6]. The average crystallite size (D CS ) was calculated using the most intense diffraction peak of (311) crystalline plane by Debye-Scherrer formula using Equation ( 1) [1,4,[6][7][8][15][16][17]20,23,[33][34][35][36][37][38]. The lattice parameter (a) calculated according to Equation (2) [6,7,16] is presented in Table 2.…”

Section: Xrd Analysismentioning

confidence: 99%

“…In all cases, the lattice parameter increased with increasing annealing temperatur The differences between the lattice parameter of ferrites were attributed to the differe ionic radii of Fe 3+ (tetra: 0.49; octa: 0.64 Å), Zn 2+ (tetra: 0.60; octa: 0.74 Å), Cu 2+ (tetra: 0.5 octa: 0.73 Å), Ni 2+ (tetra: 0.54; octa: 0.78 Å), Mn 2+ (tetra: 0.58; octa: 0.69 Å), and Co 2+ (tetr 0.58; octa: 0.74Å) [29,39,40]. The lattice parameter increased as the particle size increase probably due to the decrease of surface tension caused by the size effect [16,20].…”

Section: Transmission Electron Microscopymentioning

confidence: 99%

“…These properties make them suitable for applications such as sodium-ion batteries, microwave absorbers, magnetic liquids, magnetic refrigeration, magnetic storage, dye removal, enhancement of water oxidation processes, magnetic recording, photocatalysis, ferrofluid technology, medical diagnostics, etc. [ 8 , 17 , 18 , 19 , 20 ]. Depending on the size and shape of particles, NFO exhibits paramagnetic or ferromagnetic behavior, while CuFO exhibits ferromagnetic behavior [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

2021

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The formation, structure, and thermal and magnetic properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) (60% MFe2O4/40% SiO2) nanocomposites produced by a modified sol-gel method, followed by annealing at 300, 600, 900 and 1200 °C, were studied. The thermal analysis and Fourier transform infrared spectroscopy showed the formation of metal-glyoxylates below 210 °C and their decomposition into the corresponding ferrite around 300 °C. The evolution of crystalline phases and variation of crystallite sizes differs from ferrite to ferrite and depends on the annealing temperature. The magnetic measurements revealed the dependence of saturation and remanent magnetization, coercivity, and anisotropy on ferrite type, annealing temperature, and particle size. By annealing the nanocomposites (NCs) at 1200 °C paramagnetic MnFe2O4, CoFe2O4, NiFe2O4 and CuFe2O4 and antiferromagnetic ZnFe2O4 are obtained.

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Section: Resultsmentioning

confidence: 99%

Section: Xrd Analysismentioning

confidence: 99%

Section: Transmission Electron Microscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

2021

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“…Among various types of ferrites, the M‐type barium hexaferrite with formula (MFe 12 O 19 , where M = divalent metal ion) is a magnetoplumbite and possesses remarkable dielectric, optical, and magnetic properties, which have been applied as microwave absorber, sensors, data storage devices, telecommunications, and radar absorber. Barium hexaferrite has small band gap energy; hence, it is highly useful to fabricate the catalytic system active solar light irradiation 13‐15 . Moreover, these barium ferrites materials possess high saturation magnetization, high coercivity, and large crystalline anisotropy, which make this type of materials applicable in magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

et al. 2021

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Summary Mg and Mn ions doping were performed in barium hexaferrite (Ba1−xMgxFe12−yMnyO19) (x = 0.0, 0.30, 0.45, 0.60, 0.75, 0.90) and (y = 0.0, 0.15, 0.30, 0.45, 0.60, 0.75) via facile micro‐emulsion route. XRD analysis revealed the formation of single‐phase hexagonal geometry of Ba1−xMgxFe12−yMnyO19 with the successful doping of the Mg and Mn ions. The average crystallite size was 19.5 nm, which was increased by increasing the dopant contents. The functional groups were identified by FTIR analysis. The dopant contents (Mg and Mn) affected the dielectric properties Ba1−xMgxFe12−yMnyO19 and AC conductivity was increased, while dielectric loss, tangent loss, and resistivity were decreased as the concentration of dopant ions was increased. The Tauc's plot was used for the band gap estimation of Ba1−xMgxFe12−yMnyO19, the band gap values were decreased from 2.94 to 1.90 (eV) due to generation Fermi energy and change in the Ba2+ ions at the tetra‐ and octahedral locations. Photocatalytic activity (PCA) was performed under visible light by degrading Rhodamine B (RhB) dye. The RhB dye was degraded up to 85% within 50 minutes following the first order reaction kinetics with 0.0224 min−1 rate constant. The results revealed that the BaFe12O19 NPs the band gap can be tuned by doping the Mg and Mn ions to enhance the visible light harvesting for economical photocatalytic applications in various fields.

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Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites

Almessiere

Slimani

Algarou

et al. 2021

Adv Elect Materials

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The Sr0.5Ba0.5ScxFe12–xO19(SrBaSc)/NiFe2O4(NiFe) hard–soft nanocomposites (NCs) are synthesized by in situ sol–gel route. Impact of Sc3+ doping on their structure, morphology, and magnetic properties are examined. X‐ray diﬀraction confirms the coexistence of SrBaSc and NiFe phases without any impurity. Morphology of NCs reveals a cluster of hexagonal plate decorated by spherical grains. Magnetic characteristics of the NCs are examined by using a vibration sample magnetometer at room temperature and 10 K. The x = 0.000 sample shows some kinks in their M–H loops and the occurrence of two peaks in dM/dH(H). All the NCs with Sc3+ exhibit smooth shapes of M–H curves with single peak, revealing the complete and perfect exchange coupling behavior. The diverse magnetic parameters at both temperatures are determined. The values of saturation and remanent magnetizations are decreasing with the Sc content increase. The intensive electromagnetic absorption is observed in all the samples. Reﬂection loss (RL) of more than ‐18 dB is observed above 3 GHz. Strong coupling between Sc concentration and amplitude–frequency characteristics of the RL can be used for developing of the functional media for high‐frequency devices and will open broad perspectives for practical application in radar‐absorbing technology and electromagnetic compatibility.

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Synthesis and characterization of NiFe2O4 ferrite: Sol–gel and hydrothermal synthesis routes effect on magnetic, structural and dielectric characteristics

Cited by 100 publications

References 30 publications

Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites

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Synthesis and characterization of NiFe2O4 ferrite: Sol–gel and hydrothermal synthesis routes effect on magnetic, structural and dielectric characteristics

Cited by 100 publications

References 30 publications

Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

Formation, Structure and Magnetic Properties of MFe2O4@SiO2 (M = Co, Mn, Zn, Ni, Cu) Nanocomposites

Band gap tuning of BaFe 12 O 19 with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr0.5Ba0.5ScxFe12‐xO19/NiFe2O4 Hard/Soft Nanocomposites

Contact Info

Product

Resources

About

Band gap tuning of BaFe ₁₂ O ₁₉ with Mg and Mn doping to enhance solar light absorption for photocatalytic application

Tuning the Structure, Magnetic, and High Frequency Properties of Sc‐Doped Sr_0.5Ba_0.5Sc_xFe_12‐_xO₁₉/NiFe₂O₄ Hard/Soft Nanocomposites