MAGNETIC-PROPERTIES OF (GDXY1-X)2CO7B3 COMPOUNDS

被引:28
作者
BALLOU, R [1 ]
BURZO, E [1 ]
POP, V [1 ]
PENTEK, A [1 ]
机构
[1] UNIV CLUJ NAPOCA,FAC PHYS,R-3400 CLUJ NAPOCA,ROMANIA
关键词
D O I
10.1063/1.353594
中图分类号
O59 [应用物理学];
学科分类号
摘要
The (GdxY1-x)2Co7B3 compounds crystallize in a hexagonal structure having the P6/mmm space group. Magnetic measurements performed in the temperature range 4-800 K show that Y2Co7B3 is a ferromagnet, while the compounds with x greater-than-or-equal-to 0.2 are ferrimagnetically ordered. The gadolinium and cobalt magnetization compensate at a composition x congruent-to 0.26. The mean cobalt moment is strongly dependent on the composition, increasing from 0.29mu(B)/atom (x=0) up to 0.82mu(B)/atom (x=1.0). Above the Curie points the magnetic susceptibilities follow a Curie-Weiss law for Y2Co7B3 and hyperbolic-type dependencies for the ferrimagnetic compounds. The effective cobalt moments are only a little composition dependent. The composition dependence of the mean cobalt moments is analyzed in correlation with the exchange interactions.
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页码:5695 / 5697
页数:3
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