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S. Maqsood^a,*, M. A. Javed^b, S. Mumtaz^c, Mohammad K. Al-Sadoon^d
Chalcogenide Letters, Vol.21, No.6, pp. 449-458, 2024, DOI:10.15251/CL.2024.216.449
Abstract In this letter, first-principle computations are utilized in order to explore the Cd-based chalcogenide spinels CdSm₂(S/Se)₄ spinels. Generalized gradient approximation (PBEsolGGA) and modified Becke-Johnson potential (mBJ) are used to calculate structural, mechanical, spin-polarized electronic and magnetic features. The optimization analysis demonstrates that ferromagnetic contends of both chalcogenides releases a greater amount of energy than the anti-ferromagnetic contends. Further, structural and thermodynamic stability are justified through the calculations Born stability criteria and formation energy. Additionally, mechanical features indicate both chalcogenides are ductile in nature through calculations of Poisson's and Pugh ratios. Curie temperature (Tc) in terms of More >

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S. H. Farhan^*, B. M. Al Dabbagh, H. Aboud
Chalcogenide Letters, Vol.21, No.6, pp. 459-473, 2024, DOI:10.15251/CL.2024.216.459
Abstract Glass samples with varying compositions was prepared by standard approach. The composition of the samples was (50-x) B₂O₃–25TeO₂–25BaO-xDy₂O₃, with x ranging from 0 to 1.25 mol%. XRD profiles confirmed that the samples were amorphous, as there were no long-range lattice arrangements observed. The successful preparation of amorphous samples was further confirmed by the absence of sharp lines & peaks. The optical properties of the obtained samples were analyzed. That a decrease in E_opt values resulted in a higher value of the refractive index (n) for the glasses. However, when the concentration of Dy₂O₃ exceeded certain levels (0.75,… More >

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G. Hao^*, S. Xuye, G. Tao, C. Lin
Chalcogenide Letters, Vol.21, No.6, pp. 475-482, 2024, DOI:10.15251/CL.2024.216.475
Abstract Cu₂CdSnS₄-CdS nanocomposites are successfully prepared via a two-step solvothermal approach. Powder X-ray diffraction (XRD), Scanning electron microscope (SEM), Photoluminescence (PL) spectroscopy and UV-Vis diffuse reflectance spectroscopy are used to characterized the Cu₂CdSnS₄-CdS nanocomposites. The results show that Cu₂CdSnS₄-CdS nanocomposites present nanoflower structure self-assembling by nanosheets with a thickness of ~50nm and spheroid structure with the average size of 100nm. The band gap is calculated to be 1.5eV. The photodegradation efficiency under visible-light irradiation is reached to 94%, the work provide a new strategy to prepare Cu₂CdSnS₄-CdS nanocomposites for high effective visible-light photocatalytic material. More >

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N. G. Basil Ralph^a, S. Shanmugha Soundare^b, R. Harshinee^a, S. Ariponnammal^a,*
Chalcogenide Letters, Vol.21, No.6, pp. 483-491, 2024, DOI:10.15251/CL.2024.216.483
Abstract Nanocomposite SnSeO₃/ZnSeO₃ has been synthesized by hydrothermal method. EDAX and XRD confirm the perfect formation of SnSeO₃/ZnSeO₃ nano composite. It shows an interesting morphology of rectangular bar. Particle size is determined as 137.3nm. It is an effective applicant for applications in optoelectronic field. The energy gap of SnSeO₃/ZnSeO₃ nanocomposite is 5.52 eV. Urbach energy value obtained is 0.0635 eV. Refractive index obtained from optical energy gap is 1.926. PL emission spectrum obtains a strong efficient emission in UV (~387.7 nm) region, weak emission in green (~520.7 nm) region, and moderate emission in red (~788.7 nm) region. The More >

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