Oxygen vacancy related defects in batio3
- 1 September 1996
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 185 (1) , 9-12
- https://doi.org/10.1080/00150199608210467
Abstract
Depending on the acceptor content of BaTiO3 crystals, two types of Ti3+ ESR signals are observed. Acceptor-poor samples, which thus also have low concentrations of compensating oxygen vacancies, Vo, contain isolated Ti3+ free small polarons. Acceptor-rich crystals show signals to be attributed to Ti3+ next to Vo—alkali-acceptor complexes. This model is supported by a comparison of the optical absorptions and light induced charge transfer transitions of both types of specimens.Keywords
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