Surface microroughness characterisation of amorphous metallic ribbons during their relief modification
| Autor: | Leonid Poperenko, Kateryna Vinnichenko |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.625436 |
| Popis: | The modification of the microrelief and structure of the surface layers of the Co- and Fe-based amorphous metal alloys (AMA) ribbons due to thermal treatment at elevated and cryogenic temperatures and under the action of an external magnetic field is studied by methods of atomic force microscopy and spectroscopic ellipsometry. The surface structure modification processes are essentially different for these two kinds of alloys. It is explained by the magnetostriction effect which is intrinsic only for Fe- based amorphous alloy and is responsible for the optical anisotropy induced in the surface layer by the treatments. Thermal annealing of the ribbons below the crystallization temperature leads to a decrease of deformational stress and to a monotonous enhancement of the roughness parameters at the surface. Annealing of the Co-based AMA at T=425°C changes the behavior of its optical conductivity spectra in the IR from non-Drude to Drude-like. It denotes the onset of the atomic structure ordering process in the subsurface layer marked by the appearance of the microscopic regions where crystallization occurs. |
| Databáze: | OpenAIRE |
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