STRUCTURAL AND MAGNETIC PROPERTIES OF RTiFe11,RTiCo11 AND RTi(Fe1-xNix)11 COMPOUNDS（R=Nd,Sm,Gd,Tb,Dy,Ho,Er AND Y）
来源期刊：JOURNAL OF RARE EARTHS1990年第4期
论文作者：杨应昌
文章页码：301 - 308
摘 要：<正> The crystallographic structure and intrinsic magnetic properties have been investigated in the RTiFe11,RTiCo11 and RTi(Fe1-XNiX)11 compounds,where R represents Nd,Sm,Gd,Tb,Dy,Ho,Er and Y.Neutrondiffraction and Mossbauer spectra analyses have been used to study the nuclear and magnetic structure ofthese compounds.the Fe,Co,Ni and Ti atoms are found to exhibit strong site preference with f and j sites fa-voring Fe,Co and Ni atoms and the i site Ti atoms.Two different types of magnetic behavior were observed inthe RTiFe11 and RTiCo11 compounds.In the former,the interatomic distance and the number of nearestneighbor atoms play essential roles.In particular,anomalous thermal expansion behavior is presented inRTiFe11.In the latter,the magnetic properties are essentially determined by the modification of the cobaltelectronic configuration brought about by the transfer of rare earth conduction electrons to the transition 3dband.The saturation magnetization,Curie temperature and magnetocrystalline anisotropy data of RTiFe11,RTiCo11and YTi(Fe1-XNiX)11are presented.A tempt to improve the intrinsic magnetic properties inRTiFe11has been made,and the results are reported.On the basis of the crystalline field theory by using asingle-ion model,the anisotropy constants and their temperature dependence of the R ions have been calcu-lated,which helps explain the spin reorientation observed in RTiFe11.
杨应昌
摘 要：<正> The crystallographic structure and intrinsic magnetic properties have been investigated in the RTiFe11,RTiCo11 and RTi(Fe1-XNiX)11 compounds,where R represents Nd,Sm,Gd,Tb,Dy,Ho,Er and Y.Neutrondiffraction and Mossbauer spectra analyses have been used to study the nuclear and magnetic structure ofthese compounds.the Fe,Co,Ni and Ti atoms are found to exhibit strong site preference with f and j sites fa-voring Fe,Co and Ni atoms and the i site Ti atoms.Two different types of magnetic behavior were observed inthe RTiFe11 and RTiCo11 compounds.In the former,the interatomic distance and the number of nearestneighbor atoms play essential roles.In particular,anomalous thermal expansion behavior is presented inRTiFe11.In the latter,the magnetic properties are essentially determined by the modification of the cobaltelectronic configuration brought about by the transfer of rare earth conduction electrons to the transition 3dband.The saturation magnetization,Curie temperature and magnetocrystalline anisotropy data of RTiFe11,RTiCo11and YTi(Fe1-XNiX)11are presented.A tempt to improve the intrinsic magnetic properties inRTiFe11has been made,and the results are reported.On the basis of the crystalline field theory by using asingle-ion model,the anisotropy constants and their temperature dependence of the R ions have been calcu-lated,which helps explain the spin reorientation observed in RTiFe11.
关键词：
