Multiple origins of extra electron diffractions in fcc metals

2023/11/17 by Flynn Walsh, Mingwei Zhang, Walsh, Flynn +7 · 2 citations
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Microstructure and mechanical properties #Surface and Thin Film Phenomena #X-ray Diffraction in Crystallography

paper · pdf · doi:10.48550/arxiv.2311.10326

openalex publication_date 2023/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

Diffuse intensities in the electron diffraction patterns of concentrated face-centered cubic solid solutions have been widely attributed to chemical short-range order, although this connection has been recently questioned. This article explores the many non-ordering origins of commonly reported features using a combination of experimental electron microscopy and multislice diffraction simulations, which suggest that diffuse intensities largely represent thermal and static displacement scattering. A limited number of observations may reflect additional contributions from planar defects, surface terminations incommensurate with bulk periodicity, or weaker dynamical effects

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