Journal Article

PreJuSER-30193

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of vacancy defect migration in the cation sublattice of complex oxides by 18O tracer experiments

Meyer, R. ; Waser, R.FZJ* ; Helmbold, A. W. ; Borchardt, G.

2003
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1235  doi:10.1103/PhysRevLett.90.105901

Abstract: We report on O-18 tracer diffusion experiments and model calculations for the study of cation vacancy migration in oxide crystals. The model takes advantage of the electrostatic coupling forces between anion and cation defects that allow the evolution of the cation vacancy profile to be observed by anion tracer experiments. Applied to SrTiO3, the ambipolar diffusion of strontium vacancies with H-A = 3.5 eV was found to be the dominant reequilibration mechanism of the cation sublattice. This result is in contrast to earlier studies proposing the formation of SrO intergrowth phases.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Elektrokeramische Materialien (IFF-EKM)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2003
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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