Publication: Non-Arrhenius conductivity in the fast ionic conductor Li_(0.05)La_(0.5)TiO_(3): reconciling spin-lattice and electrical-conductivity relaxations
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1997-09-01
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American Physical Society
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Abstract
Nuclear magnetic resonance and electrical conductivity measurements are conducted to study the dynamics of the ionic diffusion process in the crystalline ionic conductor Li_(0.05)La_(0.5)TiO_(3). dc conductivity shows a nonArrhenius temperature dependence, similar to the one recently reported for some ionic conducting glasses. Spin-lattice and conductivity relaxations are analyzed in the same frequency and temperature range in terms of the non-Arrhenius dependence of the correlation time. Both relaxations are then described using a single correlation function of the form f(t)=exp(-(t/τ)^(β)), with β=0.4 over the whole temperature range.
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© 1997 The American Physical Society.
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