Structural and magnetic properties correlated with cation distribution of Mo-substituted cobalt ferrite nanoparticles
Heiba, zein Elabidin; Mostafa, Nasser Y.; Abd-Elkader, Omar H.;
Abstract
Mo-substituted cobalt ferrite nanoparticles; CoFe2-2xMo xO4 (0.0≤x ≤0.3) were prepared by a one-step solution combustion synthesis technique. The reactants were metal nitrates and glycine as a fuel. The samples were characterized using an X-ray diffraction (XRD), a transmission electron microscope (TEM) and a vibrating sample magnetometer (VSM). XRD analysis revealed a pure single phase of cubic spinel ferrites for all samples with x up to 0.3. The lattice parameter decreases with Mo6+ substitution linearly up to x=0.15, then nonlinearly for x≥0.2. Rietveld analysis and saturation magnetization (Ms) revealed that Mo6+ replaced Fe3+ in the tetrahedral A-sites up to x=0.15, then it replaced Fe3+ in both A-sites and B-sites for x≥0.2. The saturation magnetization (Ms) increases with increasing Mo6+ substitution up to x=0.15 then decreases. The crystallite size decreased while the microstrain increased with increasing Mo6+ substitution. Inserting Mo6+ produces large residents of defects and cation vacancies. © 2014 Elsevier B.V.
Other data
Title | Structural and magnetic properties correlated with cation distribution of Mo-substituted cobalt ferrite nanoparticles | Authors | Heiba, zein Elabidin ; Mostafa, Nasser Y.; Abd-Elkader, Omar H. | Keywords | Chemical synthesis;Crystal structure;Magentisation;Microstructure | Issue Date | 1-Jan-2014 | Journal | Journal of Magnetism and Magnetic Materials | Volume | 368 | Start page | 246 | End page | 251 | ISSN | 03048853 | DOI | 10.1016/j.jmmm.2014.05.036 | Scopus ID | 2-s2.0-84902578913 |
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