On the measurement of dislocation core periods by nanodiffraction

John Spence, C. Koch

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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
Volume81
Issue number11
DOIs
StatePublished - 2001

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Multiple scattering
Scattering
scattering
Electron beams
Activation energy
rings
periodic variations
electron beams
activation energy
Temperature
temperature dependence
Hot Temperature
probes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

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AB - 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.

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JF - Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties

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