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MM: Fachverband Metall- und Materialphysik

MM 25: Liquid and Amorphous Metals - Structure

MM 25.4: Vortrag

Dienstag, 17. März 2020, 12:30–12:45, IFW D

Correlating transmission electron microscopy data to study dynamics in amorphous structures — •Martin Peterlechner, Sven Hilke, Katharina Spangenberg, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Wilhelm-Klemm-Str. 10, D-48149 Münster

The method of transmission electron microscopy (TEM) is well suited to study atomistic structures and their dynamics. However, due to the quantum-mechanical interference of electrons with matter, the arising contrast is not straight forward to interpret. Moreover, any quant can alter the observed object, generally termed beam damage in the TEM community. Thus, either correlations of image simulations with individual experimental micrographs are used, or, more recently time autocorrelations of signals obtained by TEM. In the present work, the choice of signals for time correlations is elucidated and experimental limitations are discussed. To link the experiments to physical quantities the relaxation of an amorphous structure is analysed.