TY  - JOUR
AU  - Meyer, R.
AU  - Waser, R.
AU  - Helmbold, A. W.
AU  - Borchardt, G.
TI  - Observation of vacancy defect migration in the cation sublattice of complex oxides by 18O tracer experiments
JO  - Physical review letters
VL  - 90
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-30193
SP  - 105901-1 - 105901-4
PY  - 2003
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000181597500028
C6  - pmid:12689009
DO  - DOI:10.1103/PhysRevLett.90.105901
UR  - https://juser.fz-juelich.de/record/30193
ER  -