Structural analysis and role of cation distribution on the magnetic properties of single phase Ni-doped copper chromium ferrite

Moustafa, A. M.; Farag, I. S. Ahmed; Abdellatif, Mohamed Mehawed; Ahmed, Mohamed

doi:10.1007/s10854-019-02384-9

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…Al 2−x Mo x O 3 with 0.02 ⩽ x ⩽ 0.14 in four different grading (step 0.04) was prepared using solid-state reaction method 18 from highly pure aluminum hydroxide and ammonium molybedate (NH4) MoO 24 .4H 2 O. Weighted materials in molar ratios well mixed in agate mortar and ground to fine powder for two hours.…”

Section: Methodsmentioning

confidence: 99%

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃

Moustafa

Gad

Ward

2021

ECS J. Solid State Sci. Technol.

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The effects of Molybdenum (Mo) doping on the structural, optical, and electrical properties of alumina α-Al2−xMoxO3, (x = 0.02–0.14) synthesized via solid-state reaction method have been studied. X-ray diffraction (XRD) analysis confirms of single-phase hexagonal corundum structure in the range 0.06–0.14. The influence of Mo doping on the structural parameters was estimated from XRD data by applying the Rietveld profile fitting method and Fourier-transform infrared spectroscopy. XRD results revealed that replacing Al with Mo does not affect the unit cell dimensions owing to that Mo occupy the vacant sites available in the crystal structure. The electron density map revealed strong positive peaks corresponding to the position occupied by (Al/Mo) and the intensity of these peaks increases with increasing Mo doping. Optical properties revealed that the energy bandgaps (Eg) increase with increasing MoO3, due to the difference in the ionic radius of Al+3 and Mo+3. The dielectric properties indicated that the values of ε′ and tan δ increased as molybdenum concentration increased as a result of the free charges build-up at the interfaces. It was found that tanδ peak lies in the region where DC-conductivity dominates which is a clear indication of the contribution of ionic conduction to the dielectric loss.

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Section: Methodsmentioning

confidence: 99%

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃

Moustafa

Gad

Ward

2021

ECS J. Solid State Sci. Technol.

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“…The cell contains eight formula units (Z = 8) having space group Fd3m, corresponding to Me 2þ 8 [9]. The distribution of the cations over the tetrahedral and octahedral sites can greatly influence the physical properties of the material's structural, electrical, optical, and magnetic properties [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

Senbeto

Elangovan

2023

Journal of Nanomaterials

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Chromium(III)-doped nickel–ferrite nanoparticles, with the general formula Ni0.5Co0.5CrxFe2−xO4 (x = 0.0, 0.10, and 0.20), were prepared by the sol–gel method. The prepared samples were sintered at 700°C for 5 hr. The XRD result showed that the prepared samples are in single-phase partially inverse cubic spinel ferrite structures with space group Fd3m. From the XRD characterization, the average crystallite size for all samples decreased from 39.54 to 30.42 nm and the lattice parameters are found to be 0.8324, 0.8320, and 0.8314 nm for x = 0.0, 0.10, and 0.20, respectively. The energy dispersive X-ray (EDX) spectroscopy analysis confirmed the presence of all ions as per the stoichiometric ratios. The vibrating sample magnetometer measurements revealed that the saturation magnetization (Ms), remnant magnetization (Mr), and coercive fields are found to be decreased with increasing concentration of Cr3+ ions. The UV–vis spectroscopy analysis showed that the energy bandgap (Eg) increased with increasing the concentration of Cr3+ ion from 1.61 to 1.96 eV. The Fourier transform infrared spectra show the two main absorption bands at 407–424 cm−1 and 547–588 cm−1 corresponding to stretching vibrations of metal–oxygen in the octahedral and tetrahedral sites, respectively.

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The visable light absorption and color reversible mechanism of Co doping cubic zirconia single crystals after X-ray irradiation

Zhao,

Wu,

et al. 2024

Appl. Phys. A

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Structural analysis and role of cation distribution on the magnetic properties of single phase Ni-doped copper chromium ferrite

Cited by 7 publications

References 37 publications

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

The visable light absorption and color reversible mechanism of Co doping cubic zirconia single crystals after X-ray irradiation

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Structural analysis and role of cation distribution on the magnetic properties of single phase Ni-doped copper chromium ferrite

Cited by 7 publications

References 37 publications

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al2−x MoxO3

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al2−x MoxO3

Effects of Chromium(III) Ion Doping on Structural, Optical, and Magnetic Properties of Nickel–Cobalt Ferrite Nanoparticle

The visable light absorption and color reversible mechanism of Co doping cubic zirconia single crystals after X-ray irradiation

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Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃

Impact of Molybdenum Doping on the Structural, Optical and Dielectric Properties of α-Al_2−x Mo_xO₃