Aberration-corrected and energy-filtered precession electron diffraction
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Authors
Eggeman, AS
Barnard, JS
Midgley, PA
Abstract
We report initial findings on improvements to precession electron diffraction (PED) achieved through aberration correction of the probe-forming lens and by energy-filtering. Using current-generation aberration correctors, we show that PED patterns can, in principle, be acquired with sub-nm spatial resolution. We present initial experimental results that illustrate aberration-corrected PED of nanostructured alloys. We show also that zero loss energy filtering minimizes the inelastic background in a PED pattern, important for weak reflections, and leads to an improvement in the refinement of a crystal structure using elastic-only intensities.
Description
Keywords
Electron crystallography, Aberration correction, Precession electron diffraction
Journal Title
Zeitschrift fur Kristallographie
Conference Name
Journal ISSN
0044-2968
2196-7105
2196-7105
Volume Title
Publisher
Walter de Gruyter GmbH
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/H017712/1)
The authors would like to thank the EPSRC for financial support through grant number EP/H013378, and would like to thanks Rolls Royce plc, Dr Cathie Rae, Olivier Messe and Dr Michael Hardy for use of the nickel-based superalloy sample investigated in this study. PAM thanks the ERC for financial support through grant no. 291522 3DIMAGE.