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Related Experiment Video

Updated: Jan 8, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
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Dopant Site Occupancy Determined by Core-Loss-Filtered, Position-Averaged Convergent Beam Electron Diffraction.

Michael Deimetry1, Timothy C Petersen2, Matthew Weyland2,3

  • 1School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia.

Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada
|December 16, 2025
PubMed
Summary
This summary is machine-generated.

Core-loss-filtered convergent beam electron diffraction patterns can quantify dopant site occupancy in crystals. This advanced electron microscopy technique offers a new method for materials analysis.

Keywords:
ALCHEMIconvergent beam electron diffractioncore-loss

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Electron Microscopy

Background:

  • Convergent beam electron diffraction (CBED) and its probe position-averaged variant (PACBED) are established techniques for analyzing crystal structure.
  • PACBED patterns are effective for determining specimen thickness and crystal tilt.
  • Quantifying dopant site occupancy typically requires techniques like X-ray spectroscopy.

Purpose of the Study:

  • To demonstrate the utility of core-loss-filtered PACBED patterns for measuring dopant site occupancy.
  • To adapt strategies from energy dispersive X-ray spectroscopy for electron diffraction analysis.
  • To overcome quantification challenges using simulations.

Main Methods:

  • Simulating core-loss-filtered PACBED patterns.
  • Applying reciprocity principles between scanning and conventional transmission electron microscopy.
  • Interpreting diffraction patterns using a modified Cliff-Lorimer approach.

Main Results:

  • Core-loss-filtered PACBED patterns can determine the site occupancy of dopants in known crystal structures.
  • A measurement-based quantification strategy is limited by elemental interaction ranges.
  • Comparison with simulations incorporating generalized Cliff-Lorimer k-factors overcomes quantification limitations.

Conclusions:

  • Core-loss-filtered PACBED is a viable method for site-specific dopant analysis.
  • Simulations are crucial for accurate quantification when elemental interaction differences exist.
  • This technique enhances the capabilities of transmission electron microscopy for materials characterization.