多铁性材料Bi0．90La0．10Fe0．95R0．05O3（R=Co，Mn）的同步辐射研究  

The Research of Synchrotron Radiation for Bi0.90La0.10Fe0.95R0.05O3（R=Co,Mn）

作　　者：孔令仪[1] 王智会[2] 赵弋菲 熊建功[3] 孙泽浩[2] 孙祥[2] 周梦谣 李永涛[2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210023 [2]南京邮电大学理学院,江苏南京210023 [3]南京邮电大学理学院电子科学与工程学院,江苏南京210023

出　　处：《化工时刊》2017年第4期4-7,共4页Chemical Industry Times

基　　金：基金项目：国家自然科学基金项目（51372119）;南京邮电大学科研项目（NY214104）;国家级大学生创新创业训练计划支持.

摘　　要：利用溶胶一凝胶法制得多铁性材料样品Bi0．90La0．10Fe0．95R0．05O3（R=Co，Mn）。X射线衍射结果表明，La、Mn离子共掺杂样品的晶体结构发生了转变。VSM数据显示：La、Mn和La、Co共掺后样品与母体材料BiFeO3相比较，磁性有明显的提高。且La、Co共掺的样品相比于La、Mn共掺杂的样品，其磁性更强。X射线吸收精细结构研究结果表明：La、Mn和La、Co共掺都未对Fe原子的局域结构产生影响。Mn、Co离子的所处的局域结构却不同。Bi0.90La0.10Fe0.95R0.05O3（R=Co,Mn） polycrystalline samples were successful prepared by sol - gel method. X -ray diffraction experiment shows that La -Mn co -doped changed the crystal structure. using VSM data display by La - Mn and La - Co co - doped, the hysteresis loop of the sample was improved obviously and the re- sidual magnetization increased. The hysteresis loop of La - Co co - doped samples is more saturated than La - Mn co -doped samples and La- Co co -doped samples have less coercive force. X -ray absorption fine structure results shows that La - Mn and La - Co co - doped have no effect on the local structure of Fe atoms, but the lattice distortion degree of La - Mn co - doped sample is larger than La - Co co - doped samples, which resulted in a larger degree of distortion of the eight faces of oxygen co - doped in La - Mn co - doped sample.

关 键 词：多铁性材料 磁性 局域结构 X射线吸收精细结构 

分 类 号：O722.8[理学—晶体学]