Self-Diffusion in 57Fe/natFe Multilayers by In Situ Neutron Reflectometry
| Autor: | Amitesh Paul, Szilárd Sajti, Jean-François Moulin, László Bottyán |
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| Rok vydání: | 2020 |
| Předmět: |
In situ
Self-diffusion Materials science Period (periodic table) 020502 materials Bilayer Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Surfaces Coatings and Films 0205 materials engineering Grain boundary diffusion coefficient Neutron reflectometry Thin film 0210 nano-technology Intensity (heat transfer) |
| Zdroj: | Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. 14:S1-S4 |
| ISSN: | 1819-7094 1027-4510 |
| Popis: | Time-of-flight in situ neutron reflectometry (i-NR) on Si/[57Fe(x nm)/natFe(x nm)]4/Pt with x = 4 and 8 nm multilayers during consecutive heat treatments at 423, 448, 473 and 498 K reveal an unexpected rearrangement of free volumes and an interface smoothening in the isotopic Fe multilayer below 473 K, before the regime of regular Bragg intensity decay starts. The bilayer period dependence of the diffusivities at around 500 K, however, does not follow predictions of Harrison’s theory for the C-type regime representing grain boundary diffusion. |
| Databáze: | OpenAIRE |
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