Accurate lattice parameters from 3D electron diffraction data. I. Optical distortions

0565635 - FZÚ 2023 RIV GB eng J - Journal Article
Brázda, Petr - Klementová, Mariana - Krysiak, Yaşar - Palatinus, Lukáš
Accurate lattice parameters from 3D electron diffraction data. I. Optical distortions.
IUCrJ. Roč. 9, č. 6 (2022), s. 735-755. ISSN 2052-2525. E-ISSN 2052-2525
R&D Projects: GA MŠMT LM2018110; GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-08032S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : 3D electron diffraction * distortions * lattice parameters * parabolic distortion * precession electron diffraction
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.9, year: 2022
Method of publishing: Open access

Determination of lattice parameters from 3D electron diffraction (3D ED) data measured in a transmission electron microscope is hampered by a number of effects that seriously limit the achievable accuracy. The distortion of the diffraction patterns by the optical elements of the microscope is often the most severe problem. A thorough analysis of a number of experimental datasets shows that, in addition to the well known distortions, namely barrel-pincushion, spiral and elliptical, an additional distortion, dubbed parabolic, may be observed in the data. In precession electron diffraction data, the parabolic distortion leads to excitation-error-dependent shift and splitting of reflections. All distortions except for the elliptical distortion can be determined together with lattice parameters from a single 3D ED data set.
Permanent Link: https://hdl.handle.net/11104/0337154