The influence of tilt angle on the CMR in Sm0.6Sr0.4MnO3

In the present work, the structural and transport properties of Sm0.6Sr0.4MnO3 polycrystalline sample were investigated. The sample was prepared using solid-state reaction technique. X-ray diffraction (XRD) showed a single-phase sample. The dc resistivity and magnetoresistance (MR) were measured, in the temperature range from 40 K up to 300 K, using a cryogenic system capable of applying a magnetic field up to 5 T. A transition at Tp ∼ 89 K was observed. This transition is shifted towards higher temperatures under the effect of applied magnetic field. At low temperature, T ∼ 70 K, positive colossal magnetoresistance CMR values of 97% at magnetic field 2 T was observed and reached 99.7% at 5 T.