Magnetic properties and local configurations of 57Fe atoms in CoFe2O4 powders and CoFe2O4/PVA nanocomposites
| Autor: | V. G. Baev, Yu. A. Fedotova, S. A. Vorob’eva, A. I. Lesnikovich, I. A. Milevich |
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| Rok vydání: | 2011 |
| Předmět: |
Aqueous solution
Nanocomposite Materials science chemistry.chemical_element Condensed Matter Physics Polyvinyl alcohol Electronic Optical and Magnetic Materials chemistry.chemical_compound Nuclear magnetic resonance chemistry Chemical engineering Octahedron Transmission electron microscopy Mössbauer spectroscopy Ferrite (magnet) Cobalt |
| Zdroj: | Physics of the Solid State. 53:694-700 |
| ISSN: | 1090-6460 1063-7834 |
| DOI: | 10.1134/s1063783411040147 |
| Popis: | The composition and magnetic properties of the powders extracted from CoFe2O4 aqueous suspensions and the CoFe2O4/PVA (PVA is polyvinyl alcohol) nanocomposites with a cobalt ferrite content of 10–30 wt % have been investigated using Mossbauer spectroscopy, transmission electron microscopy, and vibration magnetometry. The cationic formulas of the cobalt ferrites synthesized have been determined. The differences between samples synthesized at temperatures of 72.5 and 82.5°C have been revealed. The specific features of the observed changes in the agglomeration of CoFe2O4 particles after introducing into the PVA matrix have been studied. It has been shown that the iron ion distribution determined by Mossbauer spectroscopy in octahedral and tetrahedral lattice sites correlates with vibration magnetometry data. |
| Databáze: | OpenAIRE |
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