Structural and magnetic studies on mechanosynthesized BaFe12−xMnxO19
| Autor: | Suzana Nóbrega de Medeiros, Andrea Paesano, R.A. Rocha, Puneet Sharma, B. Hallouche |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Rietveld refinement Analytical chemistry chemistry.chemical_element Manganese Hematite Coercivity Condensed Matter Physics Electronic Optical and Magnetic Materials Nuclear magnetic resonance chemistry visual_art Mössbauer spectroscopy visual_art.visual_art_medium Crystallite Mechanosynthesis Diffractometer |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 316:29-33 |
| ISSN: | 0304-8853 |
| Popis: | Barium hexaferrite powders with manganese substitution were prepared by mechanosynthesis. The structural and magnetic properties were characterized by X-ray diffractometer and vibration sample magnetometer, respectively. XRD patterns were refined by Rietveld method. Preferential site occupation of manganese ion was investigated by room temperature (RT) Mossbauer measurements. XRD results showed a single-phase barium hexaferrite with some residual hematite. Crystallite size was observed to decrease with substitution amount. Lower saturation magnetization and increased coercivity is observed in substituted samples. RT Mossbauer measurements showed that manganese ions preferentially occupy 12k, 4f2, and 2a sites. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect