| Autor: |
Golubkov, A., Didik, V., Kaminskii, V., Skoryatina, E., Usacheva, V., Sharenkova, N. |
| Zdroj: |
Physics of the Solid State; July 2005, Vol. 47 Issue: 7 p1233-1235, 3p |
| Abstrakt: |
Abstract: Europium diffusion in samarium sulfide was studied in the temperature range from 780 to 1100C. Data on the diffusion coefficient and activation energies for the diffusion of europium in single-crystal and polycrystalline SmS samples were obtained. In single-crystal samarium sulfide, europium was shown to migrate predominantly over lattice sites (D ≃ 10−12−10−9 cm2/s). In SmS polycrystals, diffusion was found to exhibit a complex pattern and have both a slow (D ≃ 10−10−10−9 cm2/s) and a fast (D ≃ 10−8−10−7 cm2/s) component. Europium diffusion in a polycrystal is primarily due to europium migration over the boundaries of single-crystal grains in the polycrystal, whose characteristic size is assumed to be that of x-ray coherent-scattering regions. |
| Databáze: |
Supplemental Index |
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