Fingerprint of oxygen vacancies in Gd superconductors

H. Shibahara*, J. P. Zhang, L. D. Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The arrangement of the oxygen atoms in high temperature superconductors is known to be critical to their properties. High resolution electron microscope imaging (HREM) accompanied by computer simulations has been anticipated to reveal the oxygen vacancies in the basal plane. Although images of sufficient resolution have been reported by many authors, the [100] and [010] projections have not been differentiated experimentally. We confirm here that they are clearly different using a specimen which contains a coherent grain boundary with (100), (001) in one grain parallel to (001), (010) in the second. Unfortunately we find that it is not possible to clearly answer the more important question of the oxygen content at the grain boundary.

Original languageEnglish (US)
Pages (from-to)185-191
Number of pages7
JournalUltramicroscopy
Volume27
Issue number2
DOIs
StatePublished - Mar 1989

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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