Synthesis, Characterization, Optical Properties, and Electron Paramagnetic Resonance for Nano Zn 0 . 5 Co 0 . 5 Fe 2 − x Pr x O 4
| Autor: | Samih Isber, S. Noureddine, D. El-Said Bakeer, Ramadan Awad, Z. Bitar |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Band gap Analytical chemistry Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Nuclear magnetic resonance law Transmission electron microscopy 0103 physical sciences Nano Ferrite (magnet) Calcination Fourier transform infrared spectroscopy 0210 nano-technology Electron paramagnetic resonance |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 30:3603-3609 |
| ISSN: | 1557-1947 1557-1939 |
| DOI: | 10.1007/s10948-016-3873-8 |
| Popis: | Nano ferrite samples of type Zn0.5Co0.5Fe2−x Prx O 4, 0 ≤ x ≤ 0.2, were prepared by co-precipitation method for different concentration of Pr ions at a calcination temperature of 823 K. The samples were characterized using x-ray diffraction and transmission electron microscope (TEM), UV spectroscopy, FTIR, and electron paramagnetic resonance (EPR). The increase in concentration of Pr ions shows a significant change in the formed nano ferrite particles size, degree of aggregation, energy band gap, and lattice parameters. X-band (9.24 GHz) EPR spectra at room temperature showed a decrease in the g factor as the Pr content was increased. Furthermore, the variation of the Pr3+ concentration in the samples led to different aggregation states, ranging from isolated nanoparticles with average crystal size of 28.5 to about 15 nm, as confirmed by x-ray diffraction and high-resolution transmission electron microscopy. |
| Databáze: | OpenAIRE |
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