1. Ionic conductivity of LiNaTaNbO solid solutions.
- Author
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Sidorov, N., Palatnikov, M., Teplyakova, N., Obryadina, E., and Efremov, V.
- Subjects
IONIC conductivity ,LITHIUM compounds ,SOLID solutions ,FERROELECTRIC crystals ,PHASE transitions ,RAMAN spectra ,ALKALI metals - Abstract
Experimental data demonstrate that LiNaTaNbO ( y ≠ 0) ferroelectric solid solutions near special concentration points ( x = 0.125 and 0.25), which have increased degrees of short- and long-range order, undergo a superionic transition. In the Raman spectra of LiNaTaNbO, the superionic transition shows up as a predominant 'melting' of the alkali metal sublattice and broadening of the corresponding lines into a Rayleigh line wing, whereas the other sublattices in the structure remain relatively 'rigid.' The temperature of the superionic transition can be tuned by varying the degree of static disorder of structural units in the Nb/Ta sublattice. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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