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  • Küçük Resim
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    Structural, magnetic and gamma-ray shielding features of cerium doped Mg2FeTiO6 double perovskite
    (Elsevier, 2023) Saleh, Noha A.; Alqahtani, Muna Y.; Mhareb, M. H. A.; Ercan, Filiz; Ghrib, Taher; Kayed, Tarek S.; Özçelik, Bekir
    The Mg2FeTi1-xCexO6 [ x = (0, 2, 4, 6, 8, 10)%] ceramics with different Ce concentrations have been pre-pared by solid-state technique. That compounds were doped with cerium dioxide (CeO2) to develop new material for gamma radiation shielding. The prepared nanomaterials were analyzed to investigate their structural and optical properties by XRD, FTIR, SEM, magnetic properties, and UV techniques. It was de-termined by the XRPD method that the atomic and molecular structures of Ce-doped compounds were in the tetragonal crystal system and crystallized in the P4/mmm (No: 123) space group. The refinement parameters of the compound Ce doped x = 8% were gof 2.4 and Rf 0.82. The effect of the Ce doping on the magnetization was measured in the magnetic field ranging at +/- 10 kOe for two temperatures (300 and 10 K) and showed that its Saturation Magnetization (Ms) was increased with the doping increase from 6.2 to 8.1 and from 14.7 to 18.7 for the temperatures 300 and 10 K, respectively. Various radiation shielding parameters for gamma-rays, neutron, and proton were evaluated using Phy-X and SRIM soft -wares. The linear attenuation coefficient (LAC) increases gradually with adding CeO2 to Mg2FeTiO6 from 54.290 to 92.032 cm -1 at 0.015 MeV. Also, fast neutron removal cross-section ( ER ) rises from 0.077 to 0.115 cm-1 for x = 0 and x = 10%. While the sample x = 10% shows the lowest projectile range for pro-tons. This sample considers the best sample to stop protons. The Analysis demonstrates that the sample with x = 10% shows the highest gamma, proton, and neutron shielding properties nominated it to use in radiation shielding field.(c) 2022 Elsevier B.V. All rights reserved.
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    Structural, optical, and electrical properties of Zn(1-x)MgxO nano-compounds and ZnO/Zn(1-x)MgxO heterostructures
    (Elsevier Science Sa, 2022) Ercan, Filiz; Alamroo, Nabilah; Ghrib, Taher; Kayed, Tarek; Özçelik, Bekir; Ercan, İsmail; Alonizan, Norah
    In this study, the structural, thermal, optical, electrical and magnetic properties of Zn(1-x)MgxO (x = 0.0, 0.1, 0.3, 0.5) nano-compounds obtained by the addition of MgO to pure ZnO nano-compounds obtained by solid state reaction were investigated in detail. These nanomaterials were deposited by spin coating technique in hetero-structure of ZnO/Zn(1-x)MgxO. It was found by detailed structure solution that the crystal systems of nano materials obtained with MgO additive remained hexagonal, but the space group was transferred from P63mc to P6/mmm. The thermal gravimetry analysis shows the stability of prepared nanomaterials, the UV-Vis spectroscopy shows that the bandgap of the prepared was decreased from 3.02 to 2.52 eV with the Mg doping percentage. The Magnetization measurements at room temperature showed that all four of these Zn(1-x)MgxO nanostructures exhibited soft ferromagnetic behavior. The analysis of the ZnO/Zn(1-x)MgxO heterostructure showed that its band gap was increased from 3.69 to 3.79 eV, its carrier density was decreased from 1.14 x 10(19) to 4.20 x 10(13 )cm(-3) which introduce it as a good material to be used in optoelectronic devices field.