Structural and magnetic studies of Ce-Mn doped M-type SrFe12O19 hexagonal ferrites by sol-gel auto-combustion method

Yasmin, Nazia; Abdulsatar, Sidra; Hashim, Mohd Yussni; Zahid, Maria; Gillani, Saher Fatima; Kalsoom, Ambreen; Ashiq, Muhammad Naeem; Inam, Iqra; Safdar, Muhammad; Mirza, Misbah

doi:10.1016/j.jmmm.2018.10.076

Cited by 52 publications

(17 citation statements)

References 22 publications

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“…The structure and area of the M-H loop are closely related to the material's particle size, composition, pore size, and cation distribution [34,35]. CFOs' magnetic properties are sensitive to the strong coupling between electron spin, charge, and lattice [36]. The samples' different magnetization is attributed to competition between the different magnetic moments of Fe 3+ (M = 5.9μ B ), Fe 2+ (M = 5.4μ B ), Mn 4+ (M = 4μ B ), and Mn 3+ (M = 5μ B ).…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Hirata

Peng

et al. 2020

J Adv Ceram

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The effects of Mn doping on the microstructure and magnetic properties of CuFeO 2 systems were studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, scanning electron microscopy (SEM), and a physical property measurement method. The microstructure measurements demonstrated that the substitution of Mn for Fe can cause lattice distortion, promote grain growth, and change the valence state of Fe and Mn ions. Ceramic samples with doping content x = 0.00-0.03 exhibited two successive magnetic transition temperature (T N) at T N1 ≈ 14 K and T N2 ≈ 10 K. T N decreased gradually with the Mn 4+ content, and T N2 was not observed in the x > 0.05 samples within a temperature range of T = 5-300 K. Magnetic hysteresis loops revealed that only anti-ferromagnetic behavior occurred in the low-doped samples (x = 0.00-0.03), and the coexistence of ferromagnetism and anti-ferromagnetism was observed in the high-doped samples (x = 0.05-0.10). Besides, the x = 0.10 sample had a maximum magnetization of 5.98 emu/g. This study provides basic experimental data for investigating the relationship between the microstructure and magnetic properties of CuFeO 2 systems.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Hirata

Peng

et al. 2020

J Adv Ceram

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“…[ 11,12 ] These properties depend on factors such as chemical composition, method of synthesis, temperature of calcination, and time taken for the calcination and nature of substituted cations. [ 13–18 ] Sol–gel autocombustion techniques provide avenue for the formation of single phase using low calcination temperature and duration. This is achieved by utilizing the heat given off during the oxidation reaction of the hydrocarbons species thereby reducing the formation temperature.…”

Section: Introductıonmentioning

confidence: 99%

Structural, Dielectric and Raman Spectroscopy of La³⁺–Ni²⁺–Zn²⁺ Substituted M‐Type Strontium Hexaferrites

Musa¹,

Abdu

Mohammed³

et al. 2021

Crystal Research and Technology

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In this work, M‐type strontium nanohexaferrites with chemical composition Ba0.8−xSr0.2LaxFe12−x−yNixZnyO19 (x = 0.00, 0.05, 0.10; y = 0.00, 0.08, 0.16) are prepared using sol–gel auto‐combustion technique. The formation of single phase hexagonal ferrites is confirmed from XRD analysis. It also reveals the presence of magnetite and the crystallites sizes are in the range of 21.31–29.91nm. The lattice constants are found to decrease with an increase in cation substitution. The FTIR spectra of the sample show three dominant peaks in the range of 400–600 cm–1 which indicate the formation of the desired hexaferrite structure. The field emission scanning electron microscope images reveal large crystallites with shapes close to the hexagonal platelet‐like whose sizes are nonuniformly distributed. Also, agglomeration is observed due to magnetic interactions between the crystallites. The dielectric constant, dielectric loss, conductivity, and dielectric modulus are analyzed using the Maxwell–Wagner model. Dielectric constant is enhanced at high frequency in the entire sample and reduction of dielectric loss is also observed with further cations substitutions.

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“…SrFe 12 O 19 as a ferrimagnetic material exhibits high coercive force, suitable chemical stability and low cost [42,43]. SrFe 12 O 19 has been extensively studied for applications in microwave devices, permanent magnets, water purification and modern high-density magnetic memory media [44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

Bavarsiha

Dadashian²,

Montazeri-Pour

et al. 2022

PAC

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In this research, three magnetically separable photocatalysts, Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO, with core/shell/shell structures were successfully prepared. In the first step, soft magnetic and hard magnetic Fe3O4 and SrFe12O19 powders were synthesized using carbon reduction and co-precipitation routes, respectively. In the second step, silica coating was performed by controlling the hydrolysis and con- densation of tetraethyl orthosilicate (TEOS) precursor on the magnetic cores. In the third step, a layer of TiO2 or ZnO photocatalytic shells was made on the as-prepared composites using titanium n-butoxide (TNBT) or zinc nitrate hexahydrate, respectively. The formation of the core/shell/shell structures was confirmed by FESEM and TEM analyses. The saturation magnetizations of the Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO photocatalytic materials were 41.5, 33 and 49 emu/g, respectively. Photocatalytic activity was evaluated by degradation percentages of methylene blue (MB) under UV illumination, which were 88%, 83% and 62%, for the Fe3O4/SiO2/TiO2, SrFe12O19//TiO2 and Fe3O4/SiO2/ZnO composites, respectively. The first-, and second-order reaction kinetics were used to find out the suitable MB removal kinetics.

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Structural and magnetic studies of Ce-Mn doped M-type SrFe12O19 hexagonal ferrites by sol-gel auto-combustion method

Cited by 52 publications

References 22 publications

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Structural, Dielectric and Raman Spectroscopy of La³⁺–Ni²⁺–Zn²⁺ Substituted M‐Type Strontium Hexaferrites

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

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Structural and magnetic studies of Ce-Mn doped M-type SrFe12O19 hexagonal ferrites by sol-gel auto-combustion method

Cited by 52 publications

References 22 publications

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Effect of Mn doping on the microstructure and magnetic properties of CuFeO2 ceramics

Structural, Dielectric and Raman Spectroscopy of La3+–Ni2+–Zn2+ Substituted M‐Type Strontium Hexaferrites

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

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Structural, Dielectric and Raman Spectroscopy of La³⁺–Ni²⁺–Zn²⁺ Substituted M‐Type Strontium Hexaferrites