On the measurement of dislocation core periods by nanodiffraction

John Spence, C. Koch

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Multiple-scattering calculations are used to demonstrate that the periodicity of dislocation cores may be measured from coherent convergent beam patterns obtained using a subnanometre probe with the electron beam aligned with the dislocation core. The resulting ‘half-order’ high-order Laue zone ring which results from a double-period core reconstruction is shown to be detectable above the background of thermal diffuse scattering. Multiple-scattering calculations which include thermal scattering are used to show the temperature and thickness dependences of this ring. Activation energies for core processes may be obtained by this method.

Original languageEnglish (US)
Pages (from-to)1701-1711
Number of pages11
JournalPhilosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Issue number11
StatePublished - Nov 2001

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy


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