金属间化物（Sm_（1－x）Y_x）_2Fe_（17）N_y结构的X射线衍射研  

X-Ray Diffraction Study on Structure of Intermetallic Compounds(Sm_(1-x)Y_x)_2Fe_(17)N_y

作　　者：罗广圣[1] 贺伦燕[1] 曾贻伟[1] 杨伏明[1] 

机构地区：[1]南昌大学,北京师范大学,中国科学院物理研究所

出　　处：《南昌大学学报（工科版）》1995年第3期78-84,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：江西省自然科学基金

摘　　要：通过Ｘ射线衍射等手段对赝三元金屑间化物（Ｓｍ＿（１－ｘ）Ｙ＿ｘ）＿２Ｆｅ＿（１７）Ｎ＿ｙ（ｘ＝０，０．２．０．４．０．６，０．８和１．０；２＜ｙ＜３）的晶体结构及自旋磁结构进行了研究。由试验结果得出以下结论：１）当Ｙ的含量ｘ为０．４时，已出现两相共存现象，但两相中以Ｔｈ＿２Ｚｎ＿（１７）型结构相为主，Ｔｈ＿２Ｎｉ＿（１７）型结构相为次；当Ｙ的含量了达到０．６时，其晶体结构由Ｔｈ＿２Ｚｈ＿（１７）型结构变为Ｔｈ＿２Ｎｉ＿（１７）型结构；２）当Ｙ的含量ｘ在０．８～１．０的范围内，存在自旋磁结构的变化，即由易Ｃ轴各向异性变为易Ｃ平面各向异性；３）杂质相（α－Ｆｅ相）的含量随着Ｙ含量ｘ的增加而减小。X-ray diffraction method was used to study the crystal structure and the spinmagnetic structure of intermetallic compounds(Sm_(1-x)Y_x)_2Fe_(17)N_y (x= 0,0.2,0.4,0.6,0.8, and1.0;2<y<3).The experimental results have confirmed the following facts:1)There coexist twophases in intermetallic compounds (Sm_(1-x)Y_x)_2Fe_(17)N_y when the yttrium content x exceeds 0.4,but the Th2Zn17 type structure phase is main phase and the Th2Ni17 type structure phase is secondphase;The crystal structure of intermetallic compounds(Sm_(1-x)Y_x)_2Fe_(17)N_y changes fromTh2Zn17 type to Th2Ni17 type when the yttrium content x exceeds 0.6;2)The spin magneticstructure of intermetallic compounds (Sm_(1-x)Y_x)_2Fe_(17)N_y changes from easy C-axis anisotropyto easy C-plane anisotropy as the yttrium content ranges from x=0.8 to 1.0;3)The impurityphases content of intermetallic compounds(Sm_(1-x)Y_x)_2Fe_(17)N_y(α-Fe phase)decreases with theincrease of yttrium content x。

关 键 词：X射线衍射 自旋磁结构 晶体结构 金属间化合物 

分 类 号：O614[理学—无机化学]