中文摘要：

采用传统高温固相反应法制备了空穴掺杂的系列样品Sr2xKxFeMoO6（0≤x≤0．04），研究了其晶体结构和磁性质．X射线粉末衍射结果表明该系列样品均为单相，四方晶系，空间群为I4／m．碱金属K的含量可以调控反位缺陷的浓度．未掺杂样品Sr2FeM006在280K时的原胞磁矩为1．12μB．掺杂量为x=0．04样品的原胞磁矩为1．26μB．阳离子有序、晶格畸变是影响Sr2-xKxFeMoO6磁性的重要因素．

英文摘要：

Samples of Sr2-xKxFeMoO6 （x = 0, 0.01, 0.02, 0.03, 0.04） are prepared by standard solid-state reaction. The crystal structures and magnetic properties for the ordered double perovskite oxides Sr2xKxFeMoO6（0≤x≤0.04） are investigated. X-ray powder diffraction studies reveal that all the samples are of single phase and each of them has a I4/m symmetry. The anti-site defects in double perovskite oxides of SrzFeMoO6 may be adjusted by alkali metal element of K doping. The unit cell magnetizations at 280 K are 1.12μB for x = 0.00 and 1.26#B for x = 0.04. The cation-ordering and the variation of structure parameters play improtant roles in determining the magnetism in the doping system.