| Autor: |
Guskos, N Anagnostakis, EA Likodimos, V Bodziony, T and Typek, J Maryniak, M Narkiewicz, U Kucharewicz, I and Waplak, S |
| Jazyk: |
angličtina |
| Rok vydání: |
2005 |
| Popis: |
Ferromagnetic resonance (FMR) and ac conductivity have been applied to study a polymer composite containing as filler a binary mixture of magnetite (Fe3O4) and cementite (Fe3C) nanoparticles (30-50 nm) dispersed in a diamagnetic carbon matrix, which was synthesized by the carburization of nanocrystalline iron. Ac conductivity measurements showed thermally activated behavior involving a range of activation energies and power law frequency dependence at high frequencies similar to conducting polymer composites randomly filled with metal particles. Ferromagnetic resonance measurements revealed a relatively narrow FMR line at high temperatures indicating the presence of ferromagnetic nanoparticles, where thermal fluctuations and interparticle interactions determine the FMR temperature variation. An abrupt change of the FMR spectra was observed at T |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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