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Effects of Multiple Local Environments on Electron Energy Loss Spectra of Epitaxial Perovskite Interfaces. | LitMetric

AI Article Synopsis

  • - The study analyzed how local chemical environments influence the electron energy loss spectra in complex multiferroic oxides, focusing on the interface between bismuth ferrite (BFO) and lanthanum strontium manganate (LSMO).
  • - Researchers used both computational models and experimental techniques to examine the O K-edge spectra, looking at periodicity across equivalent positions and how individual atomic environments affect the overall spectral results.
  • - Findings revealed that even minor chemical variations significantly alter spectral features, while strain mainly causes a small shift in energy, which helps explain the observed spectral flattening near the interface due to the response from various local atomic environments.

Article Abstract

The role of local chemical environments in the electron energy loss spectra of complex multiferroic oxides was studied using computational and experimental techniques. The evolution of the O K-edge across an interface between bismuth ferrite (BFO) and lanthanum strontium manganate (LSMO) was considered through spectral averaging over crystallographically equivalent positions to capture the periodicity of the local O environments. Computational techniques were used to investigate the contribution of individual atomic environments to the overall spectrum, and the role of doping and strain was considered. Chemical variation, even at the low level, was found to have a major impact on the spectral features, whereas strain only induced a small chemical shift to the edge onset energy. Through a combination of these methods, it was possible to explain experimentally observed effects such as spectral flattening near the interface as the combination of spectral responses from multiple local atomic environments.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9791663PMC
http://dx.doi.org/10.1021/acs.jpcc.2c06879DOI Listing

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