Precession electron diffraction tomography on twinned crystals: application to CaTiO.sub.3./sub. thin films

0519115 - FZÚ 2020 RIV GB eng J - Journal Article
Steciuk, Gwladys - David, A. - Petříček, Václav - Palatinus, Lukáš - Mercey, B. - Prellier, W. - Pautrat, A. - Boullay, P.
Precession electron diffraction tomography on twinned crystals: application to CaTiO₃ thin films.
Journal of Applied Crystallography. Roč. 52, č. 3 (2019), s. 626-636. ISSN 0021-8898. E-ISSN 1600-5767
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA18-10504S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : electron diffraction * thin films * twinning * perovskites
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.995, year: 2019
Method of publishing: Limited access
https://doi.org/10.1107/s1600576719005569

Strain engineering via epitaxial thin-film synthesis is an efficient way to modify the crystal structure of a material in order to induce new features or improve existing properties. This past decade, precession electron diffraction tomography has emerged as a relevant technique for the structural characterization of nano-sized materials. While its usefulness has already been demonstrated for solving the unknown structure of materials deposited in the form of thin films, the frequent existence of orientation variants within the film introduces a severe bias in the structure refinement. This is il lustrated here using CaTiO3 films deposited on SrTiO3 substrates as a case study. By taking into account twinning in the structural analysis, it is shown that the structure of the CaTiO3 films can be refined with an accuracy comparable to that obtained by dynamical refinement from non-twinned data.
Permanent Link: http://hdl.handle.net/11104/0304137