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X-ray and neutron diffraction of yttrium–barium–copper–oxide: Modeling diffraction intensity variations produced by surface leaching

Published online by Cambridge University Press:  31 January 2011

Seth A. Watkins  and
F. Hadley Cocks
Seth A. Watkins
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708-0300
F. Hadley Cocks
Affiliation:
Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708-0300
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Abstract

High normal current fluences have long been reported to produce major changes in the x-ray diffraction pattern of YBa2Cu3O7−x (YBCO). These x-ray diffraction effects have now been shown to result from the removal of barium from the YBCO near-surface lattice together with the formation of a thin barium oxide overlayer. Neutron diffraction reveals that the bulk crystallographic structure remains unaltered by charge fluences of more than 40 million C/cm2, and Auger electron spectroscopy confirms the presence of surface barium enrichment.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 2773 - 2777
Copyright
Copyright © Materials Research Society 1999

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