快淬(Er_(l-x)Sm_x)_2Fe_(17)C_y化合物的结构与磁性  

STRUCTURE AND MAGNETIC PROPERTIES OF RAPIDLY QUENCHED (Er_(1-x)Sm_x)_2Fe_(17)C_y

作　　者：沈保根[1] 孔麟书[1] 曹蕾[1] 

机构地区：[1]中国科学院物理研究所磁学国家重点实验室,北京100080

出　　处：《物理学报》1993年第6期999-1005,共7页Acta Physica Sinica

基　　金：国家自然科学基金资助的课题

摘　　要：用快速急冷方法制备了(Er_(1-x)Sm_x)_2Fe_(17)C_y(x≤0.8,1.5≤y≤2.5)化合物,它们具有菱方Th_2Zn_(17)型结构,并且在高温是稳定的。与相应的不含C的(Er_(1-x)Sm_x)_2Fe_(17)化合物比较,当C含量y=2.5时,引起单胞体积增加～6.3％,居里温度增加约330—360K,并使室温饱和磁化强度显著提高。当y≥1.5时,含Sm样品在室温时均显示出轴各向异性,(Er_(0.2)Sm_(0.8)_2Fe_(17)C_(1.5)化合物的室温各向异性场H_α=8T。We have prepared (Er(1-x)Sm_x)2Fe(17)C_y(x≤0.8,1.5≤y≤2.5) Compounds with a rhombo-hedral Th2Zn(17)- type structure by melt-spinning . These carbides are found to be stable at high temperature. The (Er(1-x)Sm_x)2Fe(17)C_y carbides with y = 2. 5 have unit cell volumes about 6.3% larger and Curie tewperatures about 330-360K higher than those of the 2:17 parent compounds. Room-temperature saturation magnetizations increase with increasing C content. It is found that the carbides containing Sm exhibit easy c-axis anisotropy at room temperature. The anisotropy field of (Er(0.2)Sm(0.8))2Fe(17)C(1.5) at room temperature is 8T.

关 键 词：金属间化合物 各向异性 磁性 快淬 

分 类 号：O482.5[理学—固体物理]