Low temperature magnetic ordering in Fe-doped TiO 2 samples
| Autor: | W. T. Herrera, C.E. Rodríguez Torres, E. M. Baggio-Saitovich, A.M. Mudarra Navarro, Francisco H. Sánchez, A.F. Cabrera, D. R. Sánchez, V. Bilovol |
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| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Magnetic order Analytical chemistry Oxide Condensed Matter Physics Atomic and Molecular Physics and Optics Ion Matrix (chemical analysis) Paramagnetism chemistry.chemical_compound Nuclear magnetic resonance chemistry Fe doped Rutile Mössbauer spectroscopy Physical and Theoretical Chemistry |
| Zdroj: | Hyperfine Interactions. 195:155-159 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-009-0113-7 |
| Popis: | Fe-doped TiO2 samples with different Fe content prepared by mechanical alloying have been investigated by means of Mossbauer spectroscopy at 300 and 4.2 K. The results indicate the coexistence of Fe2 + and Fe3 + ions in paramagnetic states at room temperatures in the rutile structure. All samples present magnetic order at 4.3 K. When the Fe concentration increases the Fe ions in the rutile matrix became closer giving the possibility of strong magnetic interactions between them. The temperature evolution of the magnetic order was followed for the 15 at.% of Fe sample. The Fe-doped oxide formed for this composition orders below 20 K reaching an almost totally magnetic ordered state at 4.3 K. |
| Databáze: | OpenAIRE |
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