Abstract
Abstract 7Li nuclear spin relaxation and electrical conductivity measurements were performed as a function of temperature for varying Li content in (1-x)GeO2:xLi2O glass series where x=0. 01 to 0. 36. Above room temperature the nuclear spin relaxation rate increases exponentially with rising temperature giving an activation energy ENMR which is always lower than the activation energy Eδ for dc conductivity. However, below x=0. 1 ENMR increases rapidly with decreasing x and is found to approach Eδ for x approaching zero. The result is discussed in view of a motion of the Li ions correlated by Coulomb interaction.
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