Article
Materials Science, Multidisciplinary
E. T. Kulatov, Yu. A. Uspenskii, L. N. Oveshnikov, A. B. Mekhiya, A. B. Davydov, A. I. Ril, S. F. Marenkin, B. A. Aronzon
Summary: Doping of Mn disrupts the crystal symmetry of Cd3As2 and transitions it into a trivial topological state with a gap of around 40 meV. Experimental studies show that the change in magneto-conductivity is closely related to the opening of the gap under different doping ratios.
Article
Engineering, Electrical & Electronic
Zein K. Heiba, Mohamed Bakr Mohamed, Noura M. Farag, Sameh Ahmed
Summary: In this study, Zn and Mn co-doped nano-NiFe2O4 (NFO) system was prepared and characterized, revealing significant effects of co-doping on the crystal structure and optical properties of NFO. The results showed that the nanocomposite samples emitted UV, violet, blue and green colors with photoluminescence intensity dependent on the amount of ZMO doping in the matrix.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Metallurgy & Metallurgical Engineering
Emine Guneri, Johnson Henry, Fatma Gode, Nilgun Kalaycioglu Ozpozan
Summary: Pure ZnO and Mn-doped ZnO thin films were prepared by chemical bath deposition method with various Mn doping concentrations. The structural, morphological, and optical properties of the films were analyzed using different techniques. XRD analysis revealed hexagonal structured ZnO in all films, with a peak shift observed in Mn-doped films. The crystallite size increased with Mn doping. The surface morphology of Mn-doped films exhibited irregularly shaped agglomerated particles. The transmittance spectra showed higher transmittance in the visible region, which decreased with Mn doping, indicating increased optical absorption. The band gap of Mn-doped films decreased with Mn doping. Mn-doped films exhibited higher optical and electrical conductivity in the UV region.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Materials Science, Ceramics
Luu Huu Nguyen, Le The Tam, Nguyen Hoai Nam, Do Khanh Tung, Nguyen Xuan Truong, Dinh Van Tuan, Nguyen Van Quynh, Nguyen Le Minh Tri, Pham Thanh Phong, Pham Hong Nam
Summary: In this study, MnFe2O4 doped Gd (MnGdxFe2-xO4 with x = 0, 0.125, 0.25, and 0.5) magnetic nanoparticles were successfully synthesized, and the effect of Gd content on the structural, optical, and magnetic properties was investigated. The replacement of Fe3+ ions with Gd3+ ions resulted in a change in crystallite size and band gap. The saturation magnetization and magnetic anisotropy decreased with increasing Gd3+ ion concentration. The substantial reliance of magnetic anisotropy on the doping concentration was demonstrated.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Long Lin, Donglin Pang, Pei Shi, Linghao Zhu, Linhao Han, Chencheng Hu, Hualong Tao, Zhanying Zhang
Summary: The magnetic and optical properties of double impurities (Fe, Mn) doped SnSe2 were investigated using first principles calculations. The results showed that the (Fe, Mn) co-doped SnSe2 system exhibited stable ferromagnetic states, and both the structure and magnetism can be improved by strain. In addition, the introduction of transition metals effectively improved the electric conductivity and adsorption strength, and strain compensated for the deficiency of ultra violet absorption in the doped system.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Sameh Ahmed, Mohamed Bakr Mohamed
Summary: Nano-Eu-doped maghemite Fe2-xEuxO3 samples were prepared using a sol-gel route. The effects of Eu doping on the structure, optical, and magnetic properties of maghemite were investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Condensed Matter
Pratima Borah, Manos P. C. Kalita
Summary: Undoped and Mn-doped V2O5 nanocrystals were synthesized and characterized. Mn doping increased the crystallite size and decreased lattice strain, stress, and energy density. The vibrational properties were affected by Mn ions and photoluminescence indicated the presence of defects. Undoped nanocrystals showed weak ferromagnetic behavior at room temperature, which was significantly enhanced after Mn doping. Mn-doped V2O5 nanocrystals are promising for spintronics applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Long Lin, Donglin Pang, Pei Shi, Linlin Su, Zehua Chen, Zhanying Zhang
Summary: In this paper, the electronic structure, magnetic and optical properties of single Mn, single Mo, and (Mn, Mo) co-doped SnSe2 were investigated using density functional theory. The results show that doping single Mn and single Mo can induce magnetism in SnSe2, and further enhancement of magnetism can be achieved by co-doping. In addition, the introduction of dopants also improves the absorption intensity of SnSe2 in the visible light range.
Article
Chemistry, Multidisciplinary
Su-Yong Kim, Kwang-Su Kim, Un-Gi Jong, Chung-Jin Kang, Song-Chol Ri, Chol-Jun Yu
Summary: In this study, we comprehensively investigated the structural, electronic, magnetic, and thermodynamic properties of lithium ferrite using first-principles calculations. We found the most stable crystalline phase and reproduced the experimental results by considering the strong correlation and spin-polarization effects. Furthermore, we calculated the phonon dispersions and plotted the P-T diagram to understand the thermodynamic stability and magnetic responses of lithium ferrite. This study provides important insights into the material properties and potential applications of lithium ferrite.
Article
Materials Science, Ceramics
Subhash Sharma, Manish Kumar, Gunjan Srinet, J. M. Siqueiros, Oscar Raymond Herrera
Summary: In this study, multiferroic ceramics Bi0.80La0.10Ca0.10Fe1-xMnxO3 were synthesized and two crystalline phases were found throughout the composition range. The addition of Mn enhanced the magnetic properties, leading to potential technological applications.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Reza Mohammadigharehbagh, Suat Pat, Nihan Akkurt, Sadan Korkmaz
Summary: The research found that Fe-doped ZnO magnetic nano-crystal thin films have different morphological, structural, optical, and electrical properties on different substrates. These films exhibit ferromagnetism and have giant magnetic moments and electrical conductivity.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Muhammad Sheraz Khan, Bingsuo Zou, Li-Jie Shi, Shangfei Yao, Arfan Bukhtiar, WeiGuo Huang, Yang Lu, JiaJun Cao, Biling Zheng
Summary: Using Density Functional Theory (DFT), we investigated the opto-electronic and magnetic properties of Mn(II)-doped ZnTe thin films. The occupation of spin-up Mn-ta levels in the absence of additional carriers leads to a super-exchange mechanism. We studied the effect of additional p-type doping on the ferromagnetism and found that the coupling of hole carriers with spin-up Mn-states stabilizes ferromagnetism in the Mn(II)-doped ZnTe thin films. Additionally, Mn(II) doping widens ZnTe's bandgap and produces spin-forbidden d-d transition peaks, while p-type defects in the doped films improve the absorption efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Huan Liu, Ganlin Shang, Can Ren, Yang Gao, Tingchao He
Summary: The study synthesized Mn-doped InP/ZnS NCs and confirmed their excellent photophysical properties.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
F. S. El-Sbakhy, M. I. Abdel-Ati, A. M. Abdelghany, O. M. Hemeda
Summary: The spinel ferrite Ni system was successfully synthesized using the flash auto-combustion method. Characterization using XRD, IR, TEM and SEM confirmed the formation of spinel phase and presence of secondary phases. Increasing Mn2+ content led to an increase in lattice parameter and a decrease in crystallite size.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Uzair, Shamsa Kanwal, Muhammad Iftikhar Khan, Wajeehah Shahid, Badriah S. Almutairi, Muhammad Amin, Nawal Ansar, Samiah Shahid, Jeong Ryeol Choi
Summary: Manganese-doped bismuth ferrites were synthesized using the coprecipitation method with the green extract Azadirachta indica. The incorporation of manganese effectively addressed the issue of increased leakage current in the ferrite material. The study analyzed the structural, dielectric, and optical properties of the materials, finding that 2% manganese doping resulted in optimal performance.
Article
Multidisciplinary Sciences
A. M. El-Naggar, Zein K. Heiba, Mohamed Bakr Mohamed, A. M. Kamal, G. Lakshminarayana
Summary: This study investigates the effect of doping nano Zn0.75-x Mn (x) Cd0.25S on the optical properties of PVA/PEG (7:3) polymer blend. The optical bandgap of the blend decreases upon doping with Zn0.75Cd0.25S, but increases with increasing Mn content. The doped blend shows enhanced nonlinear parameters, making it suitable for applications in nonlinear optics and photonics.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
A. M. El-naggar, M. M. Osman, Anwar Q. Alanazi, Mohamed Bakr Mohamed, M. A. Ebdah, A. M. Aldhafiri, Zein K. Heiba, H. A. Albrithen
Summary: The influence of CsI doping on thin films was explored, showing that 2% Cs doping can improve short-circuit current density and open-circuit potential, while further Cs doping reduces these parameters. Fill factor and power conversion efficiency slightly increase with 2% Cs doping but decrease with higher Cs amounts.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Mohamed Bakr Mohamed, Noura M. Farag, Ali Badawi
Summary: The study investigated the impact of Mn doping on NiCo2O4, confirming the formation of a single-phase solid solution through X-ray and Fourier-transform infrared spectroscopy, altering the optical properties and band gaps. SEM images showed nanoscale particles, with NCO doped with 10% Mn and S ions exhibiting the highest photoluminescence intensity.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi
Summary: This work investigates the impact of preparation temperature on the structural, optical, and electronic characteristics of vanadium doped ZnS nanoparticles. The results show that the parameters related to lattice defects, such as lattice size and microstrain, change with increasing temperature. The optical properties exhibit a decrease in the optical band gap energy and a blue shift in emitted colors with temperature. The electronic characteristics show that ZnS is a semiconductor, while doped samples exhibit half metallic or metallic characteristics.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Sameh Ahmed, Mohamed Bakr Mohamed
Summary: Nano-Eu-doped maghemite Fe2-xEuxO3 samples were prepared using a sol-gel route. The effects of Eu doping on the structure, optical, and magnetic properties of maghemite were investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Multidisciplinary
Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi
Summary: Nano Zn0.75-xCd0.25VxS (0 <= x <= 0.2, step 0.05) samples were synthesized by the molten salt solid state reaction method at low temperature. The effect of V-doping on the structural and optical properties of ZnCdS was studied using various techniques.
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Sameh Ahmed, Mohamed Bakr Mohamed
Summary: Fe1.96Eu0.04O3 (FUO)/ZnS nanocomposite system was prepared and characterized. The effect of ZnS ratio on the optical and electrical properties of the nanocomposite was investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Polymer Science
Zein K. Heiba, Mohamed Bakr Mohamed, M. Abdellatief, Ali A. Alkathiri, Sameh Ahmed
Summary: In this study, nanocrystals of gamma-Fe2-xYxO3 with different mole fractions of Y were prepared using a sol-gel route. The Y-doping effect on optical and magnetic properties was investigated.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Zein K. Heiba, Mohamed Bakr Mohamed, Sameh Ahmed, Hassan Elshimy
Summary: CdSx (x = 1.0, 0.8, 0.6, 0.4, 0.2) thin films were prepared by the sol-gel spin coating method and their phases, microstructure and optical properties were studied. The presence of sulfur deficiency was found to affect the optical parameters of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
A. M. El-naggar, M. M. Osman, Anwar Q. Alanazi, Mohamed Bakr Mohamed, Zein K. Heiba, A. M. Aldhafiri
Summary: In this study, MACl(0.33)FAPbI(3)-doped perovskite thin films were fabricated using a new method, and the effect of doping on the optical properties was investigated. The results showed that doping with MACl(0.33)FAPbI(3) can alter the optical properties of the films and improve the fill factor and power conversion efficiency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
A. M. El-naggar, Zein K. Heiba, A. M. Kamal, Omar H. Abd-Elkader, G. Lakshminarayana, Mohamed Bakr Mohamed
Summary: In this study, PVA/CMC blends loaded with Zn0.9V0.1S were synthesized at different temperatures using solid state reaction and casting methods. The distribution and elemental analysis of the nanofillers in the blend were investigated, and the thermal stability and optical features of the blend were explored. The results have significant implications for the design of organic/inorganic polymer blends for emerging technologies.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
A. M. El-naggar, Zein. K. Heiba, A. M. Kamal, G. Lakshminarayana, Omar. H. Abd-Elkader, Mohamed. Bakr Mohamed
Summary: Nonstoichiometric ZnS1-xCux powders were loaded into blended polymers using casting method. X-ray diffraction Rietveld analysis, SEM and EDS analysis were used to study the structure and surface morphology of the nanofiller. The UV-vis diffuse reflectance was utilized to investigate the optical properties, and fluorescence intensity and emitted colors were also investigated.
Article
Materials Science, Multidisciplinary
A. M. El-naggar, Zein K. Heiba, A. M. Kamal, Y. Altowairqi, Mohamed Bakr Mohamed
Summary: In this study, PVA/CMC/PVP/CdS0.9M0.1 composites were prepared and characterized. Loading CdS0.9M0.1 had a significant impact on the optical parameters and emitted fluorescence features of the PVA/CMC/PVP blend.
Article
Materials Science, Multidisciplinary
A. M. El-naggar, Zein K. Heiba, A. M. Kamal, Y. Altowairqi, Mohamed Bakr Mohamed, Omar H. Abd-Elkader, A. A. Alhazime
Summary: PVA/CMC/PEG blended polymers loaded with (1-x)CdS/xCuS nanocomposites were prepared using thermolysis and casting techniques. The optical properties were investigated, and it was found that loading CdS-CuS nanocomposites reduced the optical band gaps and increased the refractive index of the blends. The fluorescence intensity was enhanced with the introduction of CuS nanocomposites.
Correction
Optics
A. M. El-naggar, Zein K. Heiba, Mohamed Bakr Mohamed, A. M. Kamal, G. Lakshminarayana, Muhammad Ali Shar