MAGNETIC AND TRANSPORT PROPERTIES IN THE DOUBLE PEROVSKITE Sr2CrWO6
双钙钛矿Sr2CrWO6的磁性与输运性质研究

We have carried out preliminary investigations about the magnetic and transport properties of the double perovskite Sr2CrWO6. The polycrystalline sample was fabricated using solid-state reactions in an Ar atmosphere and evacuated silica capsules. The X-ray diffraction studies show that the sample is composed of Sr2CrWO6 and a small amount of impurity SrWO4. The Curie temperature, determined by the thermal magnetization measurements, is around 480 K. The electric resistivity increases with the drop of temperature and exhibits insulator behavior. A large intergrain magnetoresistance (MR) up to 20% at a low temperature (25 K) and a field of 5 T is observed. And the MR decreases to zero with increasing temperature toward 300 K. The large coercive force (5.97×104 A/m) and the low-field deviation of MR from high-field linear behavior indicate that there probably exists a large magnetic anisotropy in the compound.