Abstract
We report on transport and dielectric properties of molybdenum bronze. Dielectric constant measurements in blue bronze samples show a low temperature anomaly exhibiting two distinct relaxational processes. One of these peaks follows a Vogel–Fulcher law and is discussed in comparison with ferroelectric relaxors. The temperature dependence of the conductivity in the ohmic regime as well as the non-linear transport properties for E T <E<E T ∗ can be well described by a variable range hopping mechanism in both Blue and Red Bronze. We show that transport and dielectric properties are both very sensitive to the heat treatment applied to the sample.
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