Effect of vanadium doping on structural and magnetic properties of defective nano-nickel ferrite
Heiba, zein Elabidin; Mohamed, Mohamed Bakr; Wahba, Adel Maher; Almalowi, M. I.;
Abstract
Nano-nickel ferrites defected by vanadium doping (NiVxFe2−1.67xO4, 0 ≤ x ≤ 0.25) were prepared using a simple sol gel method. Rietveld analysis revealed a nonmonotonic change in lattice parameter, oxygen parameter and magnetization upon doping with vanadium. Cation distributions suggested from either Rietveld analysis or from experimental magnetic moments were in a good agreement. For low doping values (x = 0.05), vanadium was residing mainly in octahedral sites, while for samples with vanadium content (x ≥ 0.1) a significant part of vanadium ions resided at tetrahedral sites; a result which has been confirmed by the analysis of Fourier-transform infrared (FTIR) spectrums obtained for the samples. The transmission electron microscope (TEM) image showed fine spherical particles with size of ∼ 11 nm. All samples showed a superparamagnetic nature with a nonmonotonic change of either magnetization (MS) or coercivity (HC) with the content of nonmagnetic V5+. The cation occupancies indicated presence of an enormous number of vacancies through doping with high valence cation V5+, making present samples potential electrodes for Li- or Na-ion batteries.
Other data
Title | Effect of vanadium doping on structural and magnetic properties of defective nano-nickel ferrite | Authors | Heiba, zein Elabidin ; Mohamed, Mohamed Bakr; Wahba, Adel Maher; Almalowi, M. I. | Issue Date | 1-Apr-2018 | Journal | Applied Physics A: Materials Science and Processing | Volume | 124 | ISSN | 09478396 | DOI | 10.1007/s00339-018-1721-3 | Scopus ID | 2-s2.0-85043518753 |
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