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dc.contributor.authorAlmessiere, M. A.
dc.contributor.authorSlimani, Y.
dc.contributor.authorGüner, S.
dc.contributor.authorNawaz, M.
dc.contributor.authorBaykal, A.
dc.contributor.authorAldakheel, F.
dc.contributor.authorAkhtar, S.
dc.contributor.authorErcan, I.
dc.contributor.authorBelenli,
dc.contributor.authorOzçelik, B.
dc.date.accessioned2019-02-27T09:48:44Z
dc.date.available2019-02-27T09:48:44Z
dc.date.issued2019-01-17
dc.identifier.citationAlmessiere MA, Slimani Y, Güner S, Nawaz M, Baykal A, et al. (2019) Magnetic and structural characterization of Nb3+-substituted CoFe2O4 nanoparticles. Ceramics International. Available: http://dx.doi.org/10.1016/j.ceramint.2019.01.125.
dc.identifier.issn0272-8842
dc.identifier.doi10.1016/j.ceramint.2019.01.125
dc.identifier.urihttp://hdl.handle.net/10754/631258
dc.description.abstractThis study investigated the effect of Nb substitution on the magnetic and structural properties of CoFeO nanoparticles (NPs) synthesized by hydrothermal approach. The formation of a single phase of spinel ferrite was confirmed through X-ray powder diffraction, and crystallite sizes in the range 18–30 nm were observed. Moreover, it found that the Fourier transform infrared (FT-IR) spectra of the NPs included the main vibration bands of the spinel structure. The partially cubic structure was confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The energy band gaps for CoNbFeO were estimated to be in the range 0.48–0.53 eV for Nb content x = 0.0–0.10. Magnetization measurements at room temperature (RT; 300 K) and at 10 K were performed on spinel CoNbFeO (0.00 ≤ x ≤ 0.10) NPs using a vibrating sample magnetometer (VSM). Nb doping significantly changed the magnetization and coercivity of the Co ferrite samples. RT hysteresis curves indicated well-defined ferrimagnetic behavior for all prepared NPs with saturation magnetization (M) in the range 44.45 – 49.40 emu/g and remanent magnetization (M) in the range 12.16 – 17.90 emu/g. The coercive field (H) is found to be equal 936 Oe and is decreased with Nb substitutions. However, hysteresis curves at 10 K showed finite remanent specific magnetization (1.90–6.70 emu/g) but significant asymmetric coercivity (715–2810 Oe), particularly for the Nb-doped samples. At 10 K, the magnetization values were 4–6 times smaller but symmetric coercivity field values were 2–3 times larger compared with the RT-VSM curves. The obtained magnetic parameters indicated the semi-hard magnetic character of the Co ferrite samples at low temperatures.
dc.publisherElsevier BV
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0272884219301282
dc.subjectCoFe2O4
dc.subjectMagneto-optical properties
dc.subjectSubstituted spinel ferrites
dc.subjectTEM analysis
dc.titleMagnetic and structural characterization of Nb3+-substituted CoFe2O4 nanoparticles
dc.typeArticle
dc.contributor.departmentKAUST university, Polymer Chemistry, Thuwal, 23955, , Saudi Arabia
dc.identifier.journalCeramics International
dc.contributor.institutionDepartment of Physics, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, , Saudi Arabia
dc.contributor.institutionDepartment of Nanomedicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 34221, Dammam, , Saudi Arabia
dc.contributor.institutionDepartment of Biophysics, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 34221, Dammam, , Saudi Arabia
dc.contributor.institutionInstitute of Inorganic Chemistry, RWTH Aachen University, Aachen, D-52074, , Germany
dc.contributor.institutionDepartment of Physics, Bolu Abanat Izzet Baysal University, Bolu, 14030, , Turkey
dc.contributor.institutionDepartment of Physics, Faculty of Science and Letters, Cukurova University, Balcali-Adana, 01330, , Turkey
kaust.personAldakheel, F.
dc.date.published-online2019-01-17
dc.date.published-print2019-05


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