NONLINEARITY EXTREMUM IN NIOBIUM DOPED POTASSIUM TANTALATE

Authors
BIDAULT O MAGLIONE M
Citation
O. Bidault et M. Maglione, NONLINEARITY EXTREMUM IN NIOBIUM DOPED POTASSIUM TANTALATE, Journal de physique. I, 7(3), 1997, pp. 543-552
Citations number
32
Categorie Soggetti
Physics
Journal title
Journal de physique. I → ACNP
ISSN journal
11554304
Volume
7
Issue
3
Year of publication
1997
Pages
543 - 552
Database
ISI
SICI code
1155-4304(1997)7:3<543:NEINDP>2.0.ZU;2-Z
Abstract
We report non-linear dielectric measurements in the KTaO3:Nb system (x (Nb) less than or equal to 0.05) The non-linear susceptibility diverge s at low temperatures and reaches maximum values in the intermediate r ange (0.0075 less than or equal to x(Nb) less than or equal to 0.92). To account for this extremum non linearity, we propose a model of temp erature dependent clusters which fits with a number of experimental re ports. We also suggest that this model may be applied to the related c ompounds SrTiO3:Ca and KTaO3:Na.