钙钛矿锰氧化物Nd_(0.5)Sr_(0.5-x)Ba_xMnO_3(x=0.1,0.2)多晶的ESR研究  

Electron Spin Resonance of Perovskite Manganites Nd_(0.5)Sr_(0.5-x)Ba_xMnO_3(x=0.1,0.2) Polycrystalline

作　　者：冀钰[1] 何利民[1] 王洪金[1] 邢茹[1] 鲁毅[1] 赵建军[1] 

机构地区：[1]包头师范学院物理科学与技术学院,内蒙古包头014030

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2013年第3期297-300,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11164019;50862007);内蒙古自然科学基金资助项目(2011MS0101;2011MS0108);内蒙古高等学校科学研究重点项目(NJZZ11166;NJ10163;NJZY12202)

摘　　要：通过固相反应法合成了Nd0.5Sr0.5-xBaxMnO3(x=0.1,0.2)多晶样品,通过SQUID、XRD和电子自旋共振谱仪(ESR),对样品的结构和磁性进行了研究.XRD检测结果发现样品为单相,空间群为Pbnm.磁性测量和ESR结果表明,在降温过程中,样品经历了铁磁有序转变、电荷有序转变和反铁磁转变.根据ESR谱线的参数随温度的变化测量了各个磁有序转变温度.Polycrystalline samples Nd0.5Sr0.5-xBaxMnO3（x=0.1,0.2） were prepared by conventional solid state reaction method. The structure and magnetic properties have been studied with X-ray diffraction patterns,SQUID and ESR. The samples are single phase, and the space group is an orthorhombic Pbnm symmetry. With the decrease of temperature, samples undergo ferromagnetic transition, charge-ordering and antiferromagnetie transition. The magnetic transition temperature was observed by the spectral lines ESR.

关 键 词：钙钛矿锰氧化物 相分离 电子自旋共振 电荷有序 

分 类 号：O482.52[理学—固体物理] O614.33[理学—物理]