Processing of gadolinium–iron garnet under non-equilibrium conditions
| Autor: | S. C. Zanatta, K. L. da Silva, C. F. C. Machado, Flávio F. Ivashita, Andrea Paesano |
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| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Gadolinium Metallurgy Analytical chemistry chemistry.chemical_element Condensed Matter Physics Atomic and Molecular Physics and Optics Grinding Paramagnetism chemistry Phase (matter) visual_art Mössbauer spectroscopy visual_art.visual_art_medium Mechanosynthesis Ceramic Physical and Theoretical Chemistry Ball mill |
| Zdroj: | Hyperfine Interactions. 224:307-312 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-013-0813-x |
| Popis: | We have investigated the mechanosynthesis of gadolinium iron garnet (GdIG) by high-energy ball-milling of 3.(Gd2O3) + 10.(α-Fe) followed by thermal annealing conducted at moderate temperatures (1100 °C). The samples were characterized by X-ray diffraction and Mossbauer spectroscopy in order to determine the influence of the milling time on the final products. For as-milled samples the results revealed the enlargement of the magnetic component belonging to iron and a discrete paramagnetic component. The formation of a garnet phase was observed in all as-annealed samples treated at 1100 °C for 6 h in quantities proportional to the time of grinding the precursors. Evidently, high-energy ball milling of Gd2O3 + α-Fe powders is an important step in GdIG synthesis by a ceramic method. Single-phase garnet is observed for the samples milled for 12 and 24 h treated at 1100 °C for 6 h. |
| Databáze: | OpenAIRE |
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