Oxygen vacancy related defects in batio3

Autor:	O. F. Schirmer, R. Scharfschwerdt, H. Krösz, Th. W. Kool
Rok vydání:	1996
Předmět:	Materials science chemistry Light induced chemistry.chemical_element Charge (physics) Condensed Matter Physics Polaron Photochemistry Acceptor Oxygen Oxygen vacancy Volume concentration Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 185:9-12
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150199608210467
Popis:	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.
Databáze:	OpenAIRE
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