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(0x0.04),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Sr2FeMoO6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Sr2xKxFeMoO6磁性的重要因素.
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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第22期314-319,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:11074066)
河南师范大学博士科研启动金(批准号:01026500109)
河南省科技厅科技攻关项目(批准号:102102210186)资助的课题~~
关键词
X射线粉末衍射
晶体结构
空穴掺杂
磁性材料
X-ray powder diffraction, crystal structure, hole doping, magnetic material
