采用传统高温固相反应法和溶胶-凝胶法制备了样品Sr2 FeMoO6,分别记为1和2＃样品.X射线衍射结果表明两种方法制备的样品均为单相,四方晶系,空间群为I4/m.在烧结温度和烧结时间等同的条件下,2＃样品的Fe/Mo有序度比1＃样品的有序度要高,溶胶-凝胶法更易影响 FeO6八面体结构,且该方法提升了 FeO6八面体的对称性.1和2＃样品在300 K温度下的单胞磁矩分别为1．88和2．17μB,热扰动和反位缺陷是影响单胞磁矩的重要因素.
Sr2 FeMoO6 (SFMO)samples have been prepared by standard solid-state reaction and sol-gel method, which marked as 1 and 2# respectively.The crystal structure and magnetic properties for the ordered double perovskite oxides SFMO have been investigated.X-ray powder diffraction studies revealed that the both samples were single phase and had the I4/m symmetry.The Fe/Mo order of 2# sample was higher than that of 1# sam-ple under the same sintering temperature and time.Sol-gel method was an effective way to alter the FeO6 octa-hedron and the symmetry of the octahedron has been improved.The unit cell magnetization at 300 K was 1.88μB for 1# and 2.17μB for 2#,respectively.Thermal perturbation and the Fe/Mo anti-site defect are impor-tant reasons for the unit cell magnetization.
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