Structural and magnetic study of Fe-doped CeO sub(2)
We report the magnetic and structural properties of Fe-doped cerium oxide, obtained using the proteic sol-gel process. The samples had weak ferromagnetic behavior, with magnetization saturations of 0.05 and 0.10 emu/g for samples with 0.5% and 1% of Fe, respectively. We attribute this ferromagnetic...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2010-04, Vol.405 (7), p.1821-1825 |
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| container_issue | 7 |
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| container_title | Physica. B, Condensed matter |
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| creator | Brito, Paula CA Santos, Daniel AA Duque, Jose Gerivaldo S Macedo, Marcelo A |
| description | We report the magnetic and structural properties of Fe-doped cerium oxide, obtained using the proteic sol-gel process. The samples had weak ferromagnetic behavior, with magnetization saturations of 0.05 and 0.10 emu/g for samples with 0.5% and 1% of Fe, respectively. We attribute this ferromagnetic state to the presence of dilute localized magnetic moments inside the semiconductor matrix. In fact, within the accuracy of our measurements, X-ray diffraction data reveal the formation of single-phase structurally isomorphous CeO sub(2). Rietveld refinement carried out in Fe-doped samples showed a decreasing density of the unit cell. Furthermore, our analysis on the optical absorbance measurements and Raman scattering shows a change in the band gap of 0.18 eV and an increase in the oxygen vacancies, which was confirmed by Raman scattering peaks at 595 and 1176 cm super(-1). |
| doi_str_mv | 10.1016/j.physb.2010.01.054 |
| format | Article |
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The samples had weak ferromagnetic behavior, with magnetization saturations of 0.05 and 0.10 emu/g for samples with 0.5% and 1% of Fe, respectively. We attribute this ferromagnetic state to the presence of dilute localized magnetic moments inside the semiconductor matrix. In fact, within the accuracy of our measurements, X-ray diffraction data reveal the formation of single-phase structurally isomorphous CeO sub(2). Rietveld refinement carried out in Fe-doped samples showed a decreasing density of the unit cell. 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We attribute this ferromagnetic state to the presence of dilute localized magnetic moments inside the semiconductor matrix. In fact, within the accuracy of our measurements, X-ray diffraction data reveal the formation of single-phase structurally isomorphous CeO sub(2). Rietveld refinement carried out in Fe-doped samples showed a decreasing density of the unit cell. 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| ispartof | Physica. B, Condensed matter, 2010-04, Vol.405 (7), p.1821-1825 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter Density Diffraction Ferromagnetism Iron Magnetization Raman scattering Semiconductors |
| title | Structural and magnetic study of Fe-doped CeO sub(2) |
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