Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 53: Topical session: X-ray and neutron scattering in materials science II - Atomic migration studies ranging from neutrons to coherent X-rays
MM 53.1: Topical Talk
Donnerstag, 3. April 2014, 11:45–12:15, BAR 205
Atomic migration studies ranging from neutrons to coherent X-rays — •Bogdan Sepiol1, Markus Stana1, Manuel Ross1, and Michael Leitner1,2 — 1Universität Wien, Fakultät für Physik, Boltzmanngasse 5, 1090 Wien, Austria — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany
Numerous properties of materials can be attributed to the movement of single atoms. Understanding the processes involved in atomic transport is therefore of great importance for improving both the fabrication and the stability of materials. Studies of diffusion mechanisms on the atomic scale are, however, particularly challenging. Just a few methods are sensitive to movements on the atomic scale but they are limited to a restricted number of suitable isotopes. Due to these limiting factors it is very difficult or even impossible to apply these methods for studying metastable systems like glasses or nanocrystalline materials on the atomic scale. The advent of modern synchrotron sources opened the way for a new experimental technique which is not subject to these restrictions. I will follow in my talk the development of atomic migration studies ranging from quasielastic neutron scattering, quasielastic Mössbauer spectroscopy, nuclear resonant scattering until the most advanced method for studying dynamics in solid state materials called atomic-scale X-ray photon correlation spectroscopy.
This work was financially supported by the Austrian Science Fund (FWF) P-22402.