MAGNETIC-PROPERTIES OF A NEW SERIES OF RARE-EARTH IRON NITRIDES - R2FE17NY (Y-APPROXIMATELY-2.6)

被引:340
作者
SUN, H
COEY, JMD
OTANI, Y
HURLEY, DPF
机构
[1] Dept. of Pure and Appl. Phys., Trinity Coll., Dublin
关键词
D O I
10.1088/0953-8984/2/30/013
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A series of interstitial ternary nitrides R2Fe 17Ny with 2.3<y<2.9 has been prepared for R=Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Lu and Y. The nitrides have structures related to those of Th2Zn17 or Th2Ni17, but the unit cell volumes are 6-7% greater, and the magnetic ordering temperatures some 400 K higher than for the 2:17 parent compounds. The Fe-Fe exchange interactions are more than doubled by nitrogenation, whereas the R-Fe exchange interactions are little changed. All compounds exhibit easy-plane anisotropy at room temperature, except for Sm2Fe17Ny, which is easy-axis.
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页码:6465 / 6470
页数:6
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