Electrochemical performance and large positive–negative magnetodielectric coupling in iron chromite spinels

Naeem, Samia; Younus, Waqas; Awan, Attia; Ahmad, Naveed; Iqbal, Muhammad Javaid; Razzaq, Tehreem; Azam, M.; Naseem, Shahzad; Riaz, Saira

doi:10.1016/j.arabjc.2022.103800

Cited by 4 publications

(1 citation statement)

References 50 publications

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“…The XRD patterns of Al The average crystallite sizes, interplanar spacing, lattice parameters, cell volumes and structure type of the prepared aluminate were evaluated from the XRD data. The average crystallite size (D) of the prepared powders was calculated from the full width at half maximum intensity (FWHM = b) by using the empirical relation [30][31][32]:…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Mahi,

Benabdellah,

Elassad Zemallach Ouari

et al. 2024

Indian J Phys

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The aluminate nano-powders Al 2 XO 4 (X = Cd, Ni and Co), crystallizing in a cubic spinel, were prepared by combustion method at 900°C. The effects of cations on the structure, optical properties and distribution of the cations as well as the binding energy of the samples were studied by X-ray diffraction (XRD), UV-Vis diffuse re ectance and FT-IR) spectroscopy. The XRD analysis con rmed the spinel structure of all samples, and showed that the average crystallite size of Al 2 XO 4 increases from 23.89 to 32.72 nm, while the lattice parameter changes from 8.0490 to 8.1066 Å when going from Ni to Co. As expected, the FT-IR spectroscopy of Al 2 XO 4 showed the presence of the fundamental absorption peaks in the region (400-745 cm − 1 ), con rming the formation of the aluminate spinels. The slight shift toward longer wavenumbers is due to the low electronegativity of Cd. The forbidden bands (E g ), determined by diffuse re ectance, were found to be 3.78, 3.82 and 3.75 eV respectively for Al 2 CdO 4 , Al 2 NiO 4 and Al 2 CoO 4 , assigned to the charge transfer O 2− : 2p → X 2+ : d orbital, making our spinels good candidates for optoelectronic and photocatalytic applications.

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Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Mahi,

Benabdellah,

Elassad Zemallach Ouari

et al. 2024

Indian J Phys

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Exploration of room temperature magnetodielectric behavior in Nd0.5Dy0.5FeO3 thin films and transmission line resonators in GHz frequency range

Chander,

Arora,

Singh

et al. 2024

Physica B: Condensed Matter

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Synthesis of nanoscale spinel aluminates powder and studies of their optical and structural properties

Mahi,

Elassad Zemallach Ouari,

Mostefa

2024

Phys. Scr.

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In this research, Manganese aluminate (MA), Nickel aluminate (NA), and Zinc aluminate (ZA) nanocrystallites were synthesized using the combustion method at a temperature of 1173 K. This technique was selected for its effectiveness in producing nanocrystalline materials with high purity and precise compositional control. The synthesized nanocrystallites underwent extensive characterization to understand their structural and optical properties. Techniques such as UV-Visible spectrophotometry (UV-Vis), Fourier-transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD) were utilized to examine the impact of different cations (Mn²⁺, Ni²⁺, Zn²⁺) on the optical bandgap, binding energy, and crystallographic parameters of the materials. The optical bandgap values (Eg), determined using Tauc's formula, were 4.121 eV for manganese aluminate, 3.819 eV for nickel aluminate, and 3.771 eV for zinc aluminate. FT-IR spectroscopy identified fundamental absorption peaks within the range of 450 to 750 cm-1, confirming the formation of aluminate spinel structures. XRD analysis confirmed the presence of a cubic spinel-type structure in all three prepared samples. The results revealed that the average crystallite sizes ranged from 23.890 nm to 45.100 nm, cell volumes varied between 521.47 Å³ and 548.68 Å³, lattice constants spanned from 8.258 Å to 8.049 Å, and inter-planar spacing ranged from 2.4268 nm to 2.4532 nm. These variations were observed as the cation transitioned from nickel to manganese passing through zinc element. Additionally, Rietveld refinements were performed to further analyze and refine the crystal structures based on XRD data. This comprehensive study aimed to elucidate the relationship between the synthesis conditions and the resultant properties of the nanocrystallites, providing insights into their potential applications in fields such as optoelectronics and photocatalysis.

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Electrochemical performance and large positive–negative magnetodielectric coupling in iron chromite spinels

Cited by 4 publications

References 50 publications

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Preparation and spectroscopic study of nanosized aluminate spinels Al2XO4 (X = Cd, Ni and Co) synthesized by solution combustion technique

Exploration of room temperature magnetodielectric behavior in Nd0.5Dy0.5FeO3 thin films and transmission line resonators in GHz frequency range

Synthesis of nanoscale spinel aluminates powder and studies of their optical and structural properties

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