ANOMALOUS THERMOELECTRIC-POWER OF SOL-GEL PREPARED NDNIO3-DELTA

We are reporting, for the first time, the detailed measurement of the thermoelectric power S(T) of sol-gel prepared NdNiO3-delta (with delta = 0.12) in the temperature range of 77-300 K. Resistivity and d.c. ma gnetization measurements of the same piece of the sample are also bein g reported in the temperature ranges of 1.2-300 K and 4.2-185 K respec tively. The resistivity of the sample shows a transition at around 180 K but no such transition is reflected in the thermoelectric power of the sample. A careful analysis of the data reveals that even below 180 K the material is a metal.