Synthesis and characterization of Co_(1-2x)Ni_xMn_xCe_yFe_(2-y)O_4 nanoparticles |
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| Affiliation: | 1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia;2. Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia;3. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia;1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;2. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;3. Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia;4. Institute of Inorganic Chemistry, RWTH Aachen University, D-52074 Aachen, Germany;1. Department of Physics, Savitribai Phule Pune University, Pune 411007, Maharashtra, India;2. Department of Physics, Sir Parashurambhau College, Pune 411030, Maharashtra, India;3. Department of Mechanical Engineering, University of Texas at El Paso, El Paso, TX 79968, USA;1. Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi, Arabia;2. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi, Arabia;3. Department of Chemistry, Istanbul Medeniyet University, 34700 Istanbul, Uskudar, Turkey;4. Department of Biophysics, Institute for Research & Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi, Arabia;5. Department of Mechanical and Energy Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi, Arabia. |
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| Abstract: | Spinel ferrite Co1–2xNixMnxFe2–yCeyO4 (0.0 ≤ x = y ≤ 0.3) nanoparticles (NPs) were prepared by sol-gel auto-combustion method. The synthesized NPs were examined using several techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) coupled with EDX and elemental mapping, transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), and a vibrating sample magnetometer (VSM). The analysis of the crystal structure and the phase identification of samples indicates the formation of spinel cubic phase with the occurrence of CeO2 as secondary phase when the content of Ce substitution element increases. In addition, all produced samples exhibit cubic symmetry with space group Fd3m. TEM confirms the presence of two phases, i.e., the cubic spinel ferrite and the cubic cerium oxide (CeO2). The characteristics of hysteresis loops reveal the soft ferrimagnetic nature of the different synthesized samples. The saturation (Ms) and remanent (Mr) magnetizations fall on increasing the content of substituting elements. Compared with pure CoFe2O4 NPs, the value of coercive field (Hc) slightly increases for x = y = 0.1 and x = y = 0.2 NPs. Then, Hc reduces with further increasing the x and y contents. The squareness ratio is found to be in the 0.528–0.400 interval, indicating the single domain NPs with uniaxial anisotropy for the different produced NPs. The magneto crystalline anisotropy constant (Keff), anisotropy field (Ha), magneton number (nB) and the demagnetizing field (N) were also determined and discussed. |
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| Keywords: | Cobalt ferrite Spinel ferrites Rare earth substitution Magnetic properties Rare earths |
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