Real-space texture and pole-figure analysis using the 3D pair distribution function on a platinum thin film
An approach is described for studying texture in nanostructured materials. The approach implements the real-space texture pair distribution function (PDF), txPDF, laid out by Gong & Billinge {(2018). arXiv:1805.10342 [cond-mat]}. It is demonstrated on a fiber-textured polycrystalline Pt thin film. The approach uses 3D PDF methods to reconstruct the orientation distribution function of the powder crystallites from a set of diffraction patterns, taken at different tilt angles of the substrate with respect to the incident beam, directly from the 3D PDF of the sample. A real-space equivalent of the reciprocal-space pole figure is defined in terms of interatomic vectors in the PDF and computed for various interatomic vectors in the Pt film. Furthermore, it is shown how a valid isotropic PDF may be obtained from a weighted average over the tilt series, including the measurement conditions for the best approximant to the isotropic PDF from a single exposure, which for the case of the fiber-textured film was in a nearly grazing incidence orientation of ∼10°. Finally, an open-source Python software package, FouriGUI , is described that may be used to help in studies of texture from 3D reciprocal-space data, and indeed for Fourier transforming and visualizing 3D PDF data in general.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- German Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1876469
- Alternate ID(s):
- OSTI ID: 1893741
- Report Number(s):
- BNL-223594-2022-JAAM; PII: S2052252522006674
- Journal Information:
- IUCrJ, Journal Name: IUCrJ Journal Issue: 5 Vol. 9; ISSN 2052-2525; ISSN IUCRAJ
- Publisher:
- International Union of Crystallography (IUCr)Copyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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