Understanding D-Spacing Variation in XRD and Thin Film Analysis

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SUMMARY

The discussion centers on the discrepancies observed in X-ray diffraction (XRD) diffractograms of thin films compared to standard powder diffraction data from the JCPDS card. Key factors influencing these differences include the geometric factors of the experimental apparatus, which affect angular intensity, and the crystallinity of the thin film sample. Non-polycrystalline samples require consideration of the multiplicity of Bragg planes, which can further alter peak intensities. Understanding these elements is crucial for accurate thin film analysis.

PREREQUISITES
  • X-ray diffraction (XRD) fundamentals
  • Understanding of JCPDS card standards
  • Knowledge of thin film characterization techniques
  • Familiarity with Bragg's law and crystallography
NEXT STEPS
  • Research geometric factors in XRD instrumentation
  • Study the impact of crystallinity on XRD peak intensities
  • Learn about the multiplicity of Bragg planes in non-polycrystalline materials
  • Explore advanced thin film analysis techniques
USEFUL FOR

Researchers and scientists in materials science, particularly those involved in thin film analysis and XRD characterization, will benefit from this discussion.

kasse
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Xrd

(Topic is misleading)

The relative height of the peaks in my XRD diffractogram are different from those given in the standard powder diffraction database (JCPDS card) for a certain oxide. Is this natural? What is the most likely explanation for the discrepancy between the obtained diffractogram from a thin film and the powder diffraction standard?
 
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This may be a silly response, but does the XRD trace account for the geometric factor in your experimental apparatus?

Geometric being the angular dependence of the intensity because of the way the instrument is constructed.

If the thin film sample is not polycrystalline, it will also be necessary to account for the multiplicity of bragg planes.
 
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