Observation of Vacancy Defect Migration in the Cation Sublattice of Complex Oxides by O18 Tracer Experiments

René Meyer, Rainer Waser, Julia Helmbold, and Günter Borchardt
Phys. Rev. Lett. 90, 105901 – Published 12 March 2003

Abstract

We report on O18 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 HA=3.5eV 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.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 21 August 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.105901

©2003 American Physical Society

Authors & Affiliations

René Meyer and Rainer Waser

  • Institut für Werkstoffe der Elektrotechnik, RWTH Aachen, Germany

Julia Helmbold and Günter Borchardt

  • Institut für Metallurgie, TU Clausthal, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 10 — 14 March 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×