Tunable Band Gap and Antiferromagnetic Ordering in Co-doped CdO Nanostructures

Khalaf, A.; Matar, M.; Abdeen, W.

doi:10.1007/s10948-021-05973-0

Cited by 12 publications

(2 citation statements)

References 63 publications

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“…The following study and discussion focused on the various structural parameters and the effect of Sm 3+ substitution. Equation (1) shows how the standard relationship, which applies Bragg's rule [42], was used to calculate the lattice constant (a).…”

Section: X-ray Powder Diffraction (Xrd)mentioning

confidence: 99%

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions

Matar,

Rabaa,

Moussa

et al. 2023

Phys. Scr.

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Samarium-doped magnesium-nickel-cobalt nanoferrites (Mg1/3 Ni1/3Co1/3)Fe2-xSmxO4, with x = 0.00, 0.01, 0.02, 0.04, and 0.08, were synthesized by the coprecipitation method. X-ray diffractometer (XRD), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), X-ray photoelectric spectroscopy (XPS), Fourier Transform Infra-Red (FTIR), Raman spectroscopy, Mössbauer spectroscopy, and magnetic measurement techniques were used, to study the structure, microstructure, and magnetic properties of the samples. The formation of the cubic spinel structure was confirmed by Rietveld analysis of the XRD data and by the appearance of the two absorption bands close to 400 cm-1 and 600 cm-1 from the FTIR spectrum. Raman spectroscopy verified the formation of the spinel phase in the samples. The elemental composition, valency, and cationic distribution were examined using X-ray photoelectric spectroscopy (XPS) measurements. Experimental findings revealed that doping with Sm3+ ions had a significant effect on the magnetic properties of nanoparticles. The saturation magnetization (Ms) and coercivity field (Hc) values fluctuate depending on the crystallite size (DXRD) of the samples from XRD analysis as the Sm3+ content increases. The magnetization dependence on the applied field was investigated at different ranges of applied fields based on the output of the statistical parameters for the curve fitted using four different forms of the law of approach to saturation. The statistical parameters and physically significant fitted parameters give information on the dependence of magnetization over various applied field regions. A thorough investigation of the output parameters from fitting into various equations reveals that the composition of Mg-Ni-Co ferrites exhibits a dependence of magnetization on the applied field. Room-temperature Mössbauer spectra displayed a mix of the magnetic sextet and central quadrupole doublet, with improvement in the magnetic sextet in the Sm-doped samples. Moreover, Mössbauer spectra at 77 K showed the demise of the quadrupole doublet in all samples and showed two sextets (tetrahedral and octahedral sites). Sm-doping reduced the values of the hyperfine magnetic field of both sextets. All Fe ions can be found in the Fe3+ state, according to the isomer shift values and there is a migration of Fe3+ ions from octahedral to tetrahedral sites upon Sm doping, which was confirmed by XPS measurements.

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Section: X-ray Powder Diffraction (Xrd)mentioning

confidence: 99%

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions

Matar,

Rabaa,

Moussa

et al. 2023

Phys. Scr.

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“…CdO nanoparticles are among the transparent conductive oxide (TCO) nanoparticles that the researchers are interested in because of their bene cial properties [27][28][29]. The effects of adding CdO nanoparticles to high-temperature superconductors on their superconducting properties have been studied [30,31].…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Investigations of (Bi, Pb)-2212 Superconductor Added with Different Oxide Nanoparticles

Matar,

Basma,

Abbas

et al. 2024

Materials Performance and Characterization

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In this study, superconducting samples of type Bi 1.6 Pb 0.4 Sr 1.9 Ca 1.1 Cu 2.1 O y ,(Bi, Pb))-2212, added with CdO, CdMnO, and CdFeO nanoparticles, were synthesized using a solid state reaction technique. The samples were examined using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). Thermogravimetric analysis (TGA) was utilized to evaluate the thermal stability of the pure sample throughout the different stages of the phase formation and the effect of the nanoparticles addition. The weight loss/gain by the three additions is related to the excess of oxygen, con rmed via Iodometric titration analysis and from the ndings of oxygen diffusion energy using TGA data. Vickers microhardness measurements were conducted at various applied loads (0.49-9.8 N). All of the prepared samples displayed a typical 'indentation size effect' (ISE) behavior based on the H V measurements. It was found that the optimum addition of nanoparticles, for increasing the microhardness of the (Bi, Pb)-2212 phase, was at x = 0.05 wt. %. Furthermore, various mechanical properties as Elastic modulus (E), yield strength (Y), fracture toughness(K), and brittleness index (B) were calculated for three additions of the samples studied. As for the theoretical examination of H V in the saturation limit regions, the indentationinduced cracking (IIC) model wins the comparison.

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Investigation of structural, optical, electrical, magnetic and antibacterial properties of (Mn and Sm) co-doped CdO nanostructures

et al. 2023

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Tunable Band Gap and Antiferromagnetic Ordering in Co-doped CdO Nanostructures

Cited by 12 publications

References 63 publications

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions

Thermal and Mechanical Investigations of (Bi, Pb)-2212 Superconductor Added with Different Oxide Nanoparticles

Investigation of structural, optical, electrical, magnetic and antibacterial properties of (Mn and Sm) co-doped CdO nanostructures

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Tunable Band Gap and Antiferromagnetic Ordering in Co-doped CdO Nanostructures

Cited by 12 publications

References 63 publications

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm3+ sions

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm3+ sions

Thermal and Mechanical Investigations of (Bi, Pb)-2212 Superconductor Added with Different Oxide Nanoparticles

Investigation of structural, optical, electrical, magnetic and antibacterial properties of (Mn and Sm) co-doped CdO nanostructures

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Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions

Structural, Magnetic, and Mössbauer Investigation of Mg-Ni-Co ferrites doped by Sm³⁺ sions