Depth dependence of iron diffusion in Fe3Si studied with nuclear resonant scattering

作     者：Daniel Kmiec Bogdan Sepiol Marcel Sladecek Marcus Rennhofer Svetoslav Stankov Gero Vogl Bart Laenens Johan Meersschaut Tomasz Ślęzak Marcin Zając 

作者机构：Faculty of Physics and Applied Computer Science AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland 

出 版 物：《Physical Review B》 (Phys. Rev. B Condens. Matter Mater. Phys.)

年 卷 期：2007年第75卷第5期

页      面：054306-054306页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

摘      要：The access to x-rays of third generation synchrotron radiation sources enables studies of dynamics in metallic systems. The nuclear resonant scattering (NRS) method provides information about elementary atomic jumps. When used in grazing incidence geometry, the sensitivity of the NRS method can be tuned to the surface region. This makes the method especially useful for thin film investigations. Contrary to other surface sensitive methods this technique is not only limited to the surface itself: it allows to retrieve the depth profile of diffusivity from the surface down to the bulk region of the measured sample. Fe-Si intermetallic films with a D03 structure and close to the stoichiometric Fe3Si composition have been prepared on an MgO (100) substrate. The NRS measurements in grazing incidence geometry yielded maximum iron diffusivity at the surface and diminishing continuously with the depth. The depth and temperature dependence have been measured and compared with the bulk values.