Electronic transport in RuSiO and IrSiO amorphous thin films
We present here resistivity, Hall effect and magnetoresistance measurements at low temperatures (1 K<T<300 K) and under high magnetic field (B<8 T) of Ru17Si16O67 and Ir18Si15O67 amorphous thin film. These amorphous films are characterised by a mixture of metallic RuO2 or IrO2 and insulating SiO2. For Ru17Si16O67 the resistivity decreases with increasing temperature but the variation is too small to be described by a thermal activation law. The resistivity of Ir18Si15O67 is lower than that of Ru17Si16O67, increasing with temperature. The change is only about 2% over the whole temperature range. For both materials, the Hall effect is very small and negative and varies slightly with temperature. The magnetoresistance is very small and positive not exceeding 2% at lowest temperatures and highest fields.
amorphous thin films ternary oxide transport properties mictamict alloys