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An electrical conductivity and a thermopower of sintered Li 1.1 Ti 1.9 O 4 were measured. The Seebeck coefficient is proportional to temperature. The conductivity becomes larger with increasing temperature but it does not fit to the T 1/4 relation of a variable range hopping model nor to the relation for a small polaron hopping model at lower temperatures. To explain the transport, magnetic and thermal properties of Li 1+ x Ti 2- x O 4 , it is proposed a bipolaron state in a random field.
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Watanabe et al. (1984) studied this question.
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