Low temperature electron paramagnetic resonance anomalies in Fe-based nanoparticles
| Autor: | A.M. Tishin, M. Beltran, Sergey P. Gubin, Yu. A. Koksharov, Y. Khodorkovsky, I. D. Kosobudsky |
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| Rok vydání: | 2000 |
| Předmět: |
Spin glass
Materials science Analytical chemistry General Physics and Astronomy Nanoparticle Ferromagnetic resonance law.invention Condensed Matter::Materials Science chemistry.chemical_compound Nuclear magnetic resonance chemistry Ferromagnetism law Magnetic nanoparticles Electron paramagnetic resonance Iron oxide nanoparticles Superparamagnetism |
| Zdroj: | Journal of Applied Physics. 88:1587-1592 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.373879 |
| Popis: | A study of the electron paramagnetic resonance of Fe-based nanoparticles embedded in polyethylene matrix was performed as a function of temperature ranging from 3.5 to 500 K. Nanoparticles with a narrow size distribution were prepared by the high-velocity thermodestruction of iron-containing compounds. A temperature-driven transition from superparamagnetic to ferromagnetic resonance was observed for samples with different Fe content. The unusual behavior of the spectra at about 25 K is considered evidence of a spin-glass state in iron oxide nanoparticles. |
| Databáze: | OpenAIRE |
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