THE CRYSTAL-STRUCTURE AND MAGNETIC-PROPERTIES OF R2FE17CX (X = 1.5 AND 2.0) PREPARED BY THE MELT-SPINNING METHOD

被引:16
作者
CAO, L
KONG, LS
SHEN, BG
机构
[1] State Key Lab. of Magnetism, Inst. of Phys., Chinese Acad. of Sci., Beijing
关键词
D O I
10.1088/0953-8984/5/13/015
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We have successfully prepared the carbides R2Fe17Cx (R = Y, Gd, Th, Dy, Ho and Er) with a high carbon content x = 1.5 and 2.0 by the melt-spinning method. The carbides have 3 single rhombohedral Th2Zn17 structure phase and are highly stable to at least 1100-degrees-C. The Curie temperatures T(C) are raised enormously and the saturation magnetizations change little upon carbonation. The average enhancements of T(C) are about 220 K for R2Fe17C1.5 and 265 K for R2Fe17C2.0. The volume dependence of the exchange interaction has been discussed. The Curie temperatures are analysed in terms of a mean-field model. The spin reorientation is observed to be 133 K for Er2Fe17C1.5 and 141 K for Er2Fe17C2.0.
引用
收藏
页码:2001 / 2008
页数:8
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