%0 Journal Article
%A Forbes, B. D.
%A Houben, L.
%A Mayer, J.
%A Dunin-Borkowski, Rafal
%A Allen, L. J.
%T Elemental mapping in achromatic atomic-resolution energy-filtered transmission electron microscopy
%J Ultramicroscopy
%V 147
%@ 0304-3991
%C Amsterdam
%I Elsevier Science
%M FZJ-2015-02597
%P 98 - 105
%D 2014
%X We present atomic-resolution energy-filtered transmission electron microscopy (EFTEM) images obtained with the chromatic-aberration-corrected FEI Titan PICO at the Ernst-Ruska Centre, Jülich, Germany. We find qualitative agreement between experiment and simulation for the background-subtracted EFTEM images of the Ti–L2,3 and O–K edges for a specimen of SrTiO3 oriented down the [110] zone axis. The simulations utilize the transition potential formulation for inelastic scattering, which permits a detailed investigation of contributions to the EFTEM image. We find that energy-filtered images of the Ti–L2,3 and O–K edges are lattice images and that the background-subtracted core-loss maps may not be directly interpretable as elemental maps. Simulations show that this is a result of preservation of elastic contrast, whereby the qualitative details of the image are determined primarily by elastic, coherent scattering. We show that this effect places a constraint on the range of specimen thicknesses which could theoretically yield directly useful elemental maps. In general, interpretation of EFTEM images is ideally accompanied by detailed simulations.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000343157400011
%R 10.1016/j.ultramic.2014.07.002
%U https://juser.fz-juelich.de/record/189430