A study of the structures of some (FeRu)B metallic glasses by x-ray and neutron scattering
| Autor: | Andrew Wildes, S Al-Heniti, Neil Cowlam |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Journal of Physics: Condensed Matter. 11:9139-9150 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/0953-8984/11/47/302 |
| Popis: | The atomic scale structures of the ruthenium substituted metallic glasses Fe83-xRuxB17 and Fe80-xRuxB20 have been studied by x-ray and neutron scattering. The addition of up to 22% of ruthenium causes an 5% increase in the first neighbour distance, while the co-ordination number stays roughly constant around the value n112.5±0.5. The evolution in the shape of the first peak in the radial distribution function is consistent with the new atomic correlations introduced by the addition of ruthenium. The higher real space resolution in the neutron experiments allows the first neighbour transition metal-boron correlations to be identified. The substitution of the larger transition metal causes little change in the structural order in these glasses, which are confirmed to be suitable candidates for the study of collinear and non-collinear magnetic structures in ferromagnetic metallic glasses. The variation of the magnetization of these glasses with composition can be described in an empirical way or in the context of percolation theory. Neither model requires the presence of non-collinear moments. According to the latter description the magnetization M appears to have a power law dependence on composition M = (x - xc). The magnitude of = 0.39 is close to the expected value, although the critical concentration xc = 0.595 is much greater than the values predicted by percolation theory. |
| Databáze: | OpenAIRE |
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