Gd掺杂的多铁性陶瓷BiFeO_3结构与磁性能研究  

STRUCTURAL AND MAGNETIC PROPERTIES IN MULTIFERROIC CERAMICS Bi_(1-x)Gd_xFeO_3(x=0,0.05,0.1,0.15,0.2)

作　　者：周同[1] 袁淑娟[1] 曹义明[1] 谢慧[1] 常芬芬[1] 曹世勋[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《低温物理学报》2011年第6期410-414,共5页Low Temperature Physical Letters

基　　金：国家自然科学基金项目(批准号:50932003);教育部高等学校博士学科点专项科研基金(批准号:20093108120006);上海市教育委员会科技创新基金重点项目(批准号:09ZZ95);上海市科学技术委员会发展基金(批准号:08dj1400202;10ZR1411000)资助的课题~~

摘　　要：通过固相反应法制备了Bi1-xGdxFeO3多铁性陶瓷,XRD图谱表明,随着掺杂量的增大其由三角钙钛矿结构转变为正交钙钛矿结构,Raman图谱研究亦表明Gd掺杂可能引起了其结构的转变;且随着Gd掺杂量的增大,样品的矫顽力、剩磁与饱和磁化强度都大大提高,说明Bi1-xGdxFeO3陶瓷的铁磁性在不断增强,这可能是由于Gd掺杂引起BiFeO3所固有的自旋螺旋反铁磁结构遭到破坏所致.Single-phase Bi1-xGdxFeO3 multiferroic ceramics have been synthesized by the solid state reaction method to study the influence of Gd substitution on their crystal structure and magnetic behavior. X-ray diffraction and Raman scattering spectra analysis showed that the structure of Gd doped BiFeO3 was transformed from rhombohedral lattice to orthorhombic hy increasing x. Doping with Gd also enhances the ferromagnetic moment, due to the broken cycloid spin structure caused by the distortion in the crystalline structure.

关 键 词：铁酸铋 多铁性材料 掺杂 

分 类 号：O482.5[理学—固体物理]