The temperature dependence of the ionic conductivity at low temperatures in the crystalline Li ionic conductor Li0.18La0.61TiO3 was reported. Time-domain measurements of the electric modulus were performed in order to investigate ion dynamics in the frequency range of 10–5 to 102Hz and for conductivity values in the range of 10-14 to 10-8S/cm. The ionic conductivity exhibited an Arrhenius temperature dependence below 300K and down to 120K, in contrast to the non-Arrhenius behavior found at higher temperatures; thus demonstrating that the temperature dependence of ionic conductivity in Li0.18La0.61TiO3 could not be described by a Vogel–Fulcher–Tamman law.

Temperature Dependence of the Ionic Conductivity in Li3xLa2/3–xTiO3 - Arrhenius Versus Non-Arrhenius. A.Rivera, J.Santamaría, C.León, T.Blochowicz, C.Gainaru, E.A.Rössler: Applied Physics Letters, 2003, 82[15], 2425-7