Tunable physical properties of NiO/CoFe2O4/Ba0.5Sr0.5Fe12O19 nanocomposites via controlled synthesis S Farhat, R Awad, Z Bitar Physica Scripta, 2025 Four ternary nanocomposites (NCs): (1-x-y) NiO/xCoFe2O4/yBa0.5Sr0.5Fe12O19 (0 < (x,y) < 1) were synthesized using the co-precipitation method, ball-milling, and a 950 °C calcination stage. NiO and CoFe2O4 pure phases were produced without impurities as evidenced by the x-ray diffraction (XRD) analysis. At the same time, Ba0.5Sr0.5Fe12O19 was produced with the α-Fe2O3 phase. The Rietveld refinements of the NCs showed decreased real percentages of NiO and Ba0.5Sr0.5Fe12O19, and increased spinel ferrite percentages compared to the starting proportions. This was explained by the reaction among the phases of the NCs. Transmission electron microscopy (TEM) and the selected area electron diffraction (SAED) presented different morphologies and planes, respectively, corresponding to the different phases of the NCs, in agreement with the XRD data. Fourier transform infrared spectroscopy (FTIR) specified the functional groups in the NCs, corroborating XRD results. The presence of the Ba2+, Sr2+, Co2+, Ni2+, Ni3+, Fe3+, and O2− oxidation states in the NCs is demonstrated by the x-ray photoelectron spectroscopy (XPS) technique. UV-visible spectroscopy revealed band gaps around 3 eV, indicating that the nanocomposites behaved as semiconductors. DC conductivity measurements further validated this, with the nanocomposite containing the highest spinel ferrite content showing the greatest conductivity (0.393 S m−1 at ∼783 K). The M–H hysteresis curves from vibrating sample magnetometer (VSM) measurements validated the ferromagnetic behavior of the NCs. The magnetization derivative (dM/dH) curves revealed significant exchange coupling in the nanocomposites, primarily governed by the NiO and CoFe2O4 phases. The prepared nanocomposites are suitable for biomedical, soft ferrite, and microwave absorption applications, depending on their phases.
Comparative study between oxide/soft ferrite, oxide/hard ferrite, and soft/hard ferrite nanocomposites: structural, electrical, and magnetic properties S Farhat, R Awad, Z Bitar Physica Scripta, 2024 Three binary nanocomposites (NCs): (0.5NiO/0.5Ni0.5Zn0.5Fe2O4), (0.5NiO/0.5BaFe12O19), and (0.5Ni0.5Zn0.5Fe2O4/0.5BaFe12O19) were prepared using the co-precipitation method followed by the wet ball-milling technique. X-ray diffraction analysis showed the production of NiO and Ni0.5Zn0.5Fe2O4 single phases, while the α-Fe2O3 secondary phase appeared in the BaFe12O19 and the 0.5Ni0.5Zn0.5Fe2O4/0.5BaFe12O19 nanocomposite. The transmission electron microscopy investigation and the selected area electron diffraction demonstrated the presence of the nanocomposites’ constituent phases. x-ray photoelectron spectroscopy identified the oxidation states found in the prepared samples (Ba2+, Ni2+, Ni3+, Zn2+, Fe3+, and O2−). The bandgap values ( E g ) of the nanocomposites are in the range between 2.79 and 3.66 eV, which indicates their semiconductor nature. The DC conductivity experiment confirmed the semiconducting nature of all samples, and the activation energies ( E aH ) and ( E aL ) at high and low-temperature regions, respectively, were calculated from the Arrhenius equation. According to the vibrating sample magnetometer, the NCs exhibited ferromagnetic (FM) as showed by the M-H loops. In the oxide/soft ferrite NC, the dM/dH curve indicated strong exchange coupling interactions, while the hard and the soft magnetic phases in the oxide/hard ferrite and the soft/hard ferrite NCs were weakly exchanged coupled. Significant uses had been found for each of the three nanocomposites according to their constituent phases and properties.
Comparative Analysis of Dual Dopants in Nickel Oxide: Unraveling the Impact of MgRu vs MgCu on Dielectric Properties A Alkhatib, Z Bitar Advanced Materials Research 1187, 55-79 , 2026 2026
Comparative study of the physical properties of NiO/CoFe2O4, NiO/Ba0. 5Sr0. 5Fe12O19, and CoFe2O4/Ba0. 5Sr0. 5Fe12O19 nanocomposites S Farhat, R Awad, Z Bitar Applied Physics A 132 (1), 35 , 2026 2026 Citations: 1
Structural and magnetic characteristics of synthesized La/Gd substituted (Ba, Sr) hexaferrite for permanent magnet applications D Abou Daher, Z Bitar, W Labban, W El Kanawati, R Awad Ceramics International , 2025 2025 Citations: 3
Tunable physical properties of NiO/CoFe2O4/Ba0.5Sr0.5Fe12O19 nanocomposites via controlled synthesis S Farhat, R Awad, Z Bitar Physica Scripta , 2025 2025
Investigation of Pb’s impact on the physical, optical, and magnetic characteristics of 𝐁𝐚0.5−𝐱𝐒𝐫0.5𝐏𝐛𝐱𝐅𝐞12𝐎19 hexaferrite MA Farhat, R Yassine, R Awad, Z Bitar Journal of Nanoparticles Research , 2024 2024
Investigation of structural and magnetic properties of NiO/BaFe 12 O 19 /Ni 0.5 Zn 0.5 Fe 2 O 4 nanocomposites S Farhat, R Awad, Z Bitar Applied Physics A 130 (6), 446 , 2024 2024 Citations: 2
Comparative study between oxide/soft ferrite, oxide/hard ferrite, and soft/hard ferrite nanocomposites: structural, electrical, and magnetic properties S Farhat, R Awad, Z Bitar Physica Scripta 99 (6), 065967 , 2024 2024 Citations: 3
Calcination temperature dependence of tri-magnetic nanoferrite Ni0. 33Cu0. 33Zn0. 33Fe2O4: structural, morphological, and magnetic properties MA Farhat, R Yassine, A Aridi, Z Bitar, R Awad Ceramics International 50 (11), 20582-20599 , 2024 2024 Citations: 16
Impact of Calcination Temperature on Structural and Optical Properties and Photocatalytic Efficiency of Ni 0.33 Cu 0.33 Zn 0.33 Fe 2 O 4 Nanoparticles in Aniline … MA Farhat, A Aridi, R Yassine, Z Bitar, R Awad Water, Air, & Soil Pollution 235 (2), 146 , 2024 2024 Citations: 12
Enhancement of the physico-mechanical properties of La-doped Mg–Ni–Co tri-ferrites AM Abdallah, M Rabaa, H Basma, Z Bitar, N Yaacoub, R Sayed Hassan, ... Journal of Materials Science: Materials in Electronics 35 (3), 245 , 2024 2024 Citations: 2
Synthesis and physical properties of pure NiO and Ni1–2xMgxMxO (M= Cu, Ru) nanoparticles: Role of growth temperature J Al Boukhari, Z Bitar, AA Azab, R Awad, M Rekaby Journal of Alloys and Compounds 969, 172500 , 2023 2023 Citations: 18
Effect of gadolinium and manganese on the physical properties of yttrium iron garnet S Noureddine, A Srour, Y Lakys, Z Bitar, R Awad Physica B: Condensed Matter 668, 415200 , 2023 2023 Citations: 11
Influence of (Mg, Cu) codoping on the structural, optical and magnetic properties of NiO nanoparticles synthesized by coprecipitation method J Al Boukhari, AA Azab, Z Bitar, R Awad Physica B: Condensed Matter 663, 415004 , 2023 2023 Citations: 20
Structural, optical and magnetic properties of Ni 1-2x Mg x Ru x O nanoparticles J Al Boukhari, Z Bitar, AA Azab, R Awad Physica Scripta 98 (7), 075934 , 2023 2023 Citations: 6
Physical properties and dielectric response of (Gd, Pr)-dual doped samarium iron garnet A Srour, Z Bitar, K Badreddine, R Awad Ceramics International 49 (13), 21255-21277 , 2023 2023 Citations: 11
Structural, Optical, and Dielectric Properties of CuO/CdFe 2 O 4 Nanocomposites Synthesized by the Co-precipitation Method R Yassine, AM Abdallah, R Awad, Z Bitar Materials Performance and Characterization 12 (1), 129-151 , 2023 2023 Citations: 2
Prospecting the structural and magnetic features of (x)CuO/(1-x)CdFe 2 O 4 nanocomposite system (0.0 ≤ x ≤ 1.0) R Yassine, AM Abdallah, RS Hassan, N Yaacoub, R Awad, Z Bitar Journal of Nanoparticle Research 25 (5), 90 , 2023 2023 Citations: 6
Physical properties of nanosized (x) NiO/(1− x) CdFe2O4 composites R Yassine, AM Abdallah, RS Hassan, N Yaacoub, R Awad, Z Bitar Ceramics International 48 (10), 14825-14838 , 2022 2022 Citations: 16
Structural, optical and magnetic properties of (x) NiO/(1-x) CdFe2O4 nanocomposites R Yassine, AM Abdallah, R Awad, Z Bitar Physica B: Condensed Matter 624, 413444 , 2022 2022 Citations: 18
Investigating the role of diamagnetic Cd 2+ ions on the structural, optical, and magnetic properties of YIG B Assi, Z Bitar, W Malaeb, R Sayed Hassan, N Yaacoub, R Awad Physica Scripta 96 (8), 085803 , 2021 2021 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Effect of Er 3+ and Pr 3+ on the structural, magnetic and dielectric properties of Zn-Co ferrite synthesised via co-precipitation method Z Bitar, W Abdeen, R Awad Materials Research Innovations 24 (2), 104-112 , 2020 2020 Citations: 26
Influence of (Mg, Cu) codoping on the structural, optical and magnetic properties of NiO nanoparticles synthesized by coprecipitation method J Al Boukhari, AA Azab, Z Bitar, R Awad Physica B: Condensed Matter 663, 415004 , 2023 2023 Citations: 20
Synthesis and physical properties of pure NiO and Ni1–2xMgxMxO (M= Cu, Ru) nanoparticles: Role of growth temperature J Al Boukhari, Z Bitar, AA Azab, R Awad, M Rekaby Journal of Alloys and Compounds 969, 172500 , 2023 2023 Citations: 18
Structural, optical and magnetic properties of (x) NiO/(1-x) CdFe2O4 nanocomposites R Yassine, AM Abdallah, R Awad, Z Bitar Physica B: Condensed Matter 624, 413444 , 2022 2022 Citations: 18
Calcination temperature dependence of tri-magnetic nanoferrite Ni0. 33Cu0. 33Zn0. 33Fe2O4: structural, morphological, and magnetic properties MA Farhat, R Yassine, A Aridi, Z Bitar, R Awad Ceramics International 50 (11), 20582-20599 , 2024 2024 Citations: 16
Physical properties of nanosized (x) NiO/(1− x) CdFe2O4 composites R Yassine, AM Abdallah, RS Hassan, N Yaacoub, R Awad, Z Bitar Ceramics International 48 (10), 14825-14838 , 2022 2022 Citations: 16
Effect of molybdenum doping on the structural and magnetic properties of MnFe2O4 magnetic nanoparticles F Al-Mokdad, Z Bitar, RS Hassan, N Yaacoub, R Awad Applied Physics. A, Materials Science & Processing 126 (7), 495 , 2020 2020 Citations: 16
Synthesis, Characterization, Optical Properties, and Electron Paramagnetic Resonance for Nano Zn 0 . 5 Co 0 . 5 Fe 2 − x Pr x O 4 Z Bitar, S Isber, S Noureddine, DES Bakeer, R Awad Journal of Superconductivity and Novel Magnetism 30 (12), 3603-3609 , 2017 2017 Citations: 15
Impact of Calcination Temperature on Structural and Optical Properties and Photocatalytic Efficiency of Ni 0.33 Cu 0.33 Zn 0.33 Fe 2 O 4 Nanoparticles in Aniline … MA Farhat, A Aridi, R Yassine, Z Bitar, R Awad Water, Air, & Soil Pollution 235 (2), 146 , 2024 2024 Citations: 12
Synthesis, characterization, and magnetic properties of nanosizedZn0. 5Co0. 5ErxFe2-xO4 prepared by coprecipitation method Z Bitar, DES Bakeer, R Awad Turkish Journal of Physics 43 (1), 80-92 , 2019 2019 Citations: 12
Effect of gadolinium and manganese on the physical properties of yttrium iron garnet S Noureddine, A Srour, Y Lakys, Z Bitar, R Awad Physica B: Condensed Matter 668, 415200 , 2023 2023 Citations: 11
Physical properties and dielectric response of (Gd, Pr)-dual doped samarium iron garnet A Srour, Z Bitar, K Badreddine, R Awad Ceramics International 49 (13), 21255-21277 , 2023 2023 Citations: 11
Synthesis, characterization and magnetic properties of Y 3− x Sm x Fe 5 O 12 S Noureddine, Z Bitar, A Srour, R Awad Applied Physics A 126 (11), 872 , 2020 2020 Citations: 11
The effect of PVP on morphology, optical properties and electron paramagnetic resonance of Zn 0.5 Co 0.5 Fe 2-x Pr x O 4 nanoparticles Z Bitar, D El-Said Bakeer, R Awad Journal of Physics: Conference Series 869 (1), 012045 , 2017 2017 Citations: 7
Structural, optical and magnetic properties of Ni 1-2x Mg x Ru x O nanoparticles J Al Boukhari, Z Bitar, AA Azab, R Awad Physica Scripta 98 (7), 075934 , 2023 2023 Citations: 6
Prospecting the structural and magnetic features of (x)CuO/(1-x)CdFe 2 O 4 nanocomposite system (0.0 ≤ x ≤ 1.0) R Yassine, AM Abdallah, RS Hassan, N Yaacoub, R Awad, Z Bitar Journal of Nanoparticle Research 25 (5), 90 , 2023 2023 Citations: 6
Structural and magnetic characteristics of synthesized La/Gd substituted (Ba, Sr) hexaferrite for permanent magnet applications D Abou Daher, Z Bitar, W Labban, W El Kanawati, R Awad Ceramics International , 2025 2025 Citations: 3
Comparative study between oxide/soft ferrite, oxide/hard ferrite, and soft/hard ferrite nanocomposites: structural, electrical, and magnetic properties S Farhat, R Awad, Z Bitar Physica Scripta 99 (6), 065967 , 2024 2024 Citations: 3
Investigation of structural and magnetic properties of NiO/BaFe 12 O 19 /Ni 0.5 Zn 0.5 Fe 2 O 4 nanocomposites S Farhat, R Awad, Z Bitar Applied Physics A 130 (6), 446 , 2024 2024 Citations: 2
Enhancement of the physico-mechanical properties of La-doped Mg–Ni–Co tri-ferrites AM Abdallah, M Rabaa, H Basma, Z Bitar, N Yaacoub, R Sayed Hassan, ... Journal of Materials Science: Materials in Electronics 35 (3), 245 , 2024 2024 Citations: 2
