首页|Synthesis, magnetic and electrical transport properties of magnetoresistance material Sr_2FeMoO_6 by microwave sintering
Synthesis, magnetic and electrical transport properties of magnetoresistance material Sr_2FeMoO_6 by microwave sintering
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Elsevier
Magnetoresistance material Sr_2FeMoO_6 with double perovskite structure was synthesized by micro wave sintering method using SrCO_3, Fe_2O_3 and MoO_3 as raw materials, with MnO_2 for microwave absorber. The phase structure, magnetic and electrical transport properties were investigated by X-ray powder diffraction (XRD) and vibrating-sample magnetometer. XRD analysis shows that the as-synthesized sample is Sr_2FeMoO_6 with tetragonal crystal structure and I4/mmm space group. The unit cell parameters are a=0.5587 nm, c=0.7894 nm, volume=0.2464 nml The calculated grain size of the sample is 31.62 nm, which is obtained by the Scherrer formula using the diffraction data. Magnetism testing results show that the sample Sr_2FeMoO_6 is ferromagnetic with the magnetic transition temperature of about 380 K. Under 1.0 T magnetic field, the saturation and spontaneous magnetization of Sr_2FeMoO_6 is 1.25 μB/f.u. and 1.00μB/f.u. at room temperature. The magnetoresis tance ratio of the sample is 28%. Electrical transport properties testing results indicate that the sample exhibits typical semiconductor behavior. The conductive mechanism of Sr_2FeMoO_6 is highly dependent on temperature: within the temperature range of 100-300 K, the mechanism is attributed to the small polaron variable-range hopping model; while it is ascribed to the adiabatic small polaron model within the temperature range of 80-100 K.
microwave synthesisSr_2FeMoO_6magnetic and electrical transportpropertiesmagnetoresistance
Yongqing Zhai、Jing Qiao、Guoyan Huo、Shaoqiang Han
展开 >
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China
NETL
NSTL
Elsevier
