TITLE

Electron spin resonance investigation of oxygen-vacancy-related defects in BaTiO3 thin films

AUTHOR(S)
Laguta, V. V.; Slipenyuk, A. M.; Bykov, I. P.; Glinchuk, M. D.; Maglione, M.; Michau, D.; Rosa, J.; Jastrabik, L.
PUB. DATE
July 2005
SOURCE
Applied Physics Letters;7/11/2005, Vol. 87 Issue 2, p022903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Ti3+ center, based on a regular Ti site perturbed by an oxygen vacancy (VO), is identified by electron spin resonance (ESR) in textured BaTiO3 films. The center shows tetragonal symmetry along cubic <100> axes with g-factors: g∥=1.997, g⊥=1.904. The spectrum of this defect disappeared after the film annealing at 700 °C in an O2 atmosphere. We describe the observed spectrum as Ti3+–VO couple defects or F+ center, which have never been observed in bulk BaTiO3. ESR is thus a unique tool to identify oxygen-vacancy-related defects, which have a large effect on the performance of ferroelectric films.
ACCESSION #
18008201

 

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