%0 Journal Article
%A León Yebra, Carlos
%A Rivera Calzada, Alberto Carlos
%A Várez, A.
%A Sanz, J.
%A Santamaría Sánchez-Barriga, Jacobo
%T Origin of constant loss in ionic conductors
%D 2001
%@ 0031-9007
%U https://hdl.handle.net/20.500.14352/59639
%X We have analyzed the constant loss contribution to the ac conductivity in the frequency range 10 Hz–1 MHz and temperatures down to 8 K, for two Li ionic conductors, one crystalline (Li_(0.18)La_(0.61)TiO_(3)) and the other glassy (61SiO_(2) . 35Li_(2)O . 3Al_(2)O_(3) . P_(2)O_85)). As temperature is increased a crossover is observed from a nearly constant loss to a fractional power law frequency dependence of the ac conductivity. At any fixed frequency ω, this crossover occurs at a temperature T such that ω = v_(0) exp(-E_(m)/k_(B)T), where v_(0) is the attempt frequency and E_(m) is identified with the barrier for Li^(+) ions to leave their wells.
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