Magnetic and structural characterization of Nb 3+ -substituted CoFe 2 O 4 nanoparticles

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dc.authorid0000-0003-3183-7017
dc.authorid0000-0001-7487-4817
dc.contributor.authorAlmessiere, Munirah Abdullah
dc.contributor.authorSlimani, Yassine
dc.contributor.authorGüner, Sait Barış
dc.contributor.authorNawaz, Muhammed
dc.contributor.authorBelenli, İbrahim
dc.date.accessioned2021-06-23T18:51:28Z
dc.date.available2021-06-23T18:51:28Z
dc.date.issued2019
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractThis study investigated the effect of Nb 3+ substitution on the magnetic and structural properties of CoFe 2 O 4 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 CoNb x Fe 2-x O 4 were estimated to be in the range 0.48–0.53 eV for Nb 3+ content x = 0.0–0.10. Magnetization measurements at room temperature (RT; 300 K) and at 10 K were performed on spinel CoNb x Fe 2-x O 4 (0.00 ? x ? 0.10) NPs using a vibrating sample magnetometer (VSM). Nb 3+ 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 s ) in the range 44.45 – 49.40 emu/g and remanent magnetization (M r ) in the range 12.16 – 17.90 emu/g. The coercive field (H c ) is found to be equal 936 Oe and is decreased with Nb 3+ 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 3+ -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. © 2019 Elsevier Ltd and Techna Group S.r.l.en_US
dc.description.urihttps://reader.elsevier.com/reader/sd/pii/S0272884219301282?token=A3B221109879F469D50241DB7F396A10871C283CF880D66DCC7DB559896002E232B2BD83F8328A3F89899BA251406229&originRegion=eu-west-1&originCreation=20220426122119
dc.identifier.doi10.1016/j.ceramint.2019.01.125
dc.identifier.endpage8232en_US
dc.identifier.issn0272-8842
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-85060315081en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage8222en_US
dc.identifier.urihttps://doi.org/10.1016/j.ceramint.2019.01.125
dc.identifier.urihttps://hdl.handle.net/20.500.12491/3800
dc.identifier.volume45en_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorBelenli, İbrahim
dc.language.isoenen_US
dc.publisherElsevier Ltden_US
dc.relation.ispartofCeramics Internationalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCoFe 2 O 4en_US
dc.subjectMagneto-optical propertiesen_US
dc.subjectSubstituted spinel ferritesen_US
dc.subjectTEM analysisen_US
dc.titleMagnetic and structural characterization of Nb 3+ -substituted CoFe 2 O 4 nanoparticlesen_US
dc.typeArticleen_US

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