Evolution of the structure, magnetic and optical properties of Ni 1−x Cu x Fe 2 O 4 spinel ferrites prepared by soft mechanochemical method
| Autor: | Leena S. Memesh, F.S. Al-Hazmi, F.S. Shokr, A.A. Al-Ghamdi, Lyudmila M. Bronstein |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanocomposite Band gap Scanning electron microscope Mechanical Engineering Spinel Metals and Alloys Energy-dispersive X-ray spectroscopy Analytical chemistry 02 engineering and technology engineering.material Coercivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences symbols.namesake Crystallography Lattice constant Mechanics of Materials Materials Chemistry engineering symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Alloys and Compounds. 712:82-89 |
| ISSN: | 0925-8388 |
| Popis: | A series of Ni1−xCuxFe2O4 (0 ≤ x ≤ 0.9) nanoferrites were synthesized by mechanochemical technique. The impact of the Cu substitution on the spinel cubic structure and lattice constants were studied based on Cohen least square fit model. The particle size and stoichiometry were investigated by scanning electron microscopy (SEM) and Energy dispersive spectroscopy (EDS). The substitution of Cu in Ni1−xCuxFe2O4 leads to the increase of particle size from 1.6 to 8.5 nm. The FTIR and Raman analysis revealed that the inclusion of Cu ions results in a migration of Fe ions from tetrahedral to octahedral sublattices. The magnetic (M-H) characteristics showed a remarkable enhancement of the saturation magnetization (37.8 emu/g) and coercive field (85.9Gauss) of the Ni0.5Cu0.5Fe2O4 sample. The optical properties were inspected by diffuse reflectance spectrophotometer. A decrease of the optical band gap from 2.62 eV to 1.57 eV as the content of Cu substitutions increases of 0–0.9 is monitored. The enhancement of the optical and magnetic properties of the Ni1−xCuxFe2O4 nanopowders enables them to be served as promising magneto-optical and magnetic catalysis materials. |
| Databáze: | OpenAIRE |
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