Electron spin resonance of Ti 3+ in KTa 0.9Nb 0.1O 3

Two types of Ti 3+-related centers are identified in KTa 0.9Nb 0.1O 3 by the electron spin resonance. The centers are attributed to Ti 3+–V O (oxygen vacancy) and Ti 3+–V O–Nb 5+, respectively. Both centers have an axial symmetry, and the g-factor values analysis has shown that the 3d 1 electron occ...

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Bibliographic Details
Published inSolid state communications Vol. 122; no. 5; pp. 277 - 281
Main Authors Laguta, V.V., Glinchuk, M.D., Kuzian, R.O., Nokhrin, S.N., Bykov, I.P., Jastrabı́k, L., Rosa, J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2002
Subjects
A. Perovskites
B. Crystal and ligand fields
D. ESB
B. Crystal and ligand fields
75.10.Dy
77.84.Dy
A. Perovskites
76.30.−V
D. ESB
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Summary:Two types of Ti 3+-related centers are identified in KTa 0.9Nb 0.1O 3 by the electron spin resonance. The centers are attributed to Ti 3+–V O (oxygen vacancy) and Ti 3+–V O–Nb 5+, respectively. Both centers have an axial symmetry, and the g-factor values analysis has shown that the 3d 1 electron occupies a (3 z 2– r 2) orbital. This ground state corresponds to the lattice relaxation when Ti 3+ is shifted towards V O, as it follows from the calculation in the point-ion crystal field approximation. Some recent results of computer modeling of transition-metal ion–oxygen vacancy (Me–V O) type defects in perovskites are discussed as well.
ISSN:0038-1098
1879-2766
DOI:10.1016/S0038-1098(02)00080-7