Journal
RADIATION PHYSICS AND CHEMISTRY
Volume 68, Issue 3-4, Pages 549-552Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0969-806X(03)00228-7
Keywords
Barium Titanate; donor doping; defect chemistry; positron lifetime spectroscopy
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Temperature-dependent measurements using positron lifetime spectroscopy (PLS) were carried out to study various defects in polycrystalline donor doped BaTiO3 (BT) samples. Annealing under different donor-doping level of La and Y were performed. At high doping level, it was found that with increasing doping level the average lifetime increases. This is attributed to the interplay of complexes containing oxygen vacancies V-O and other vacancies, such as V-Ba, V-Ti as well as grain boundaries. (C) 2003 Elsevier Ltd. All rights reserved.
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