双层锰氧化物La_(1.4)Sr_(1.6)Mn_2O_7单晶的电子自旋共振研究  

Electron Spin Resonance Study in a Single Crystal of the Double-layered Manganites La_(1.4)Sr_(1.6)Mn_2O_7

作　　者：赵建军[1] 邢茹[1] 鲁毅[1] 浩斯巴雅尔[1] 樊宝元[1] 

机构地区：[1]包头师范学院物理系,内蒙古包头014030

出　　处：《阴山学刊（自然科学版）》2008年第3期34-37,共4页Yinshan Academic Journal(Natural Science Edition)

基　　金：内蒙自然科学基金重点资助项目(200607010102)

摘　　要：采用光学浮区炉生长了La1.4Sr1.6Mn2O7单晶样品,利用电子自旋共振实验研究了其磁性质。在室温下,电子自旋共振谱线上存在两个共振信号:铁磁共振峰和顺磁共振峰,而且在顺磁状态下出现了少量的铁磁团簇。通过g因子的计算推测出了铁磁共振峰和顺磁共振峰的位置。Single crystals of La1.4Sr1.6Mn2O7 were melt-grown in flowing air in a floating-zone optical image furnace. Single crystal sample was prepared by conventional solid state reaction method. The structure and magnetic properties have been studied with X-ray diffraction patterns and ESR. At ground temperature, the spin spectra can be successfully reproduced by two split lines which shows that the paramagnetic and ferromagnetic. But there are some ferromagnetic clusters mixing in the paramagnetic. The g-value indicates the line position of the paramagnetic and ferromagnetic line.

关 键 词：锰氧化物 电子自旋共振 顺磁峰 铁磁峰 

分 类 号：O482.5[理学—固体物理]