Regensburg 2004 – wissenschaftliches Programm
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DS: Dünne Schichten
DS 6: Spezielle Schichten II
DS 6.2: Vortrag
Montag, 8. März 2004, 10:30–10:45, HS 32
Diffusion of iron in an Fe3Si film — •Daniel Kmiec1, Bogdan Sepiol1, Marcel Sladecek1, Gero Vogl1, Jozef Korecki2, Tomasz Slezak2, Rudolf Rüffer3, Koen Vanormelingen4 und Andre Vantomme4 — 1Institut für Materialphysik der Universität Wien, Strudlhofgasse 4, A-1090 Wien, Austria — 2Faculty of Physics and Nuclear Techniques, Univesity of Mining and Metallurgy, Mickiewicza 30, PL-30-239 Cracow, Poland — 3ESRF, F-38043 Grenoble, France — 4Instituut voor Kern- en Stralingsfysica KU Leuven, Celestijnenlaan 200 D, B 3001 Leuven, Belgium
Diffusion of iron in bulk Fe3Si proceeds via nearest-neighbour jumps [1]. The access to x-rays of third generation synchrotron radiation sources enables studies of dynamics in metallic systems in grazing incidence geometry paving the way for surface investigations. An interesting task is the comparison of diffusion in a near-surface layer and in the bulk crystal of Fe3Si. On an Fe3Si thin film produced by annealing of an Fe/Si multilayer created by molecular beam epitaxy, grazing incidence studies of synchrotron Mössbauer spectroscopy have been performed. The diffusion coefficient of Fe atoms in the bulk is in good agreement with results from previous measurements. We report about enhanced diffusion in a near-surface layer.
This work was supported by the Austrian Fonds zur Förderung der wissenschaftlichen Forschung (FWF, P-15421), bm:bwk (GZ 45.529/2-VI/B/7a/2002) and ÖAD BWTZ (15/2002).
[1] B. Sepiol, G. Vogl, Phys. Rev. Lett. 71 (1993) 731; B. Sepiol et al., Phys. Rev. Lett. 76 (1996) 3220; Phys. Rev. B 57 (1998) 10433