Abstract
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 T-p similar to 89 K was observed. This transition is shifted towards higher temperatures under the effect of applied magnetic field. At low temperature, T similar to 70 K, positive colossal magnetoresistance CMR values of 97% at magnetic field 2 T was observed and reached 99.7% at 5 T. (c) 2007 Elsevier B.V. All rights reserved.