20 September 2016 8 2K Report

Relative dislocation density using the approach of Hirsch et al.

Dislocation Density, ρ = (β2)/(9.b2)

b = Burgers Vector, and

β = Integrated Breadth (computed numerically from XRD profile data)

Let us take the example of SiC 4H (004)s reflection and the use of XRD rocking curve analysis.

How should I figure out b, Burgers Vector?

  • Monocrystalline specimen (recent systematic data available)
  • Polycrystalline specimen
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