Studies of threading dislocations in Nb(011) films

R. S. Appleton, W. Swiech, M. Ondrejcek, C. P. Flynn

Research output: Contribution to journalArticlepeer-review


We obtain strain contrast in low-energy electron microscopy, by dark-field imaging of the strain-sensitive variants of a surface reconstruction. This is employed to make visible the strain fields of dislocations in Nb(011) thin single-crystal films. The strain field symmetries reveal the dislocation Burgers vectors and identify the existence of [111]a/2 and [100]a Burgers vectors for threading dislocations in these epitaxial materials. The contrast also allows interfacial and screw dislocations to be imaged.

Original languageEnglish (US)
Pages (from-to)1639-1651
Number of pages13
JournalPhilosophical Magazine
Issue number14
StatePublished - May 11 2003

ASJC Scopus subject areas

  • Condensed Matter Physics


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