MAGNETIC-ORDERING IN CERIUM MONOCHALCOGENIDES - TEST CASE FOR EPSILON-EXPANSIONS WITH N=4

被引:68
作者
OTT, HR [1 ]
KJEMS, JK [1 ]
HULLIGER, F [1 ]
机构
[1] RISO NATL LAB,DK-4000 ROSKILDE,DENMARK
关键词
D O I
10.1103/PhysRevLett.42.1378
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
CeSe and CeTe are found by neutron diffraction to be type-II antiferromagnets with the moment along the propagation vector. The phase transitions are continuous with the critical exponent for the magnetization β=0.36±0.02. This constitutes a violation of the ε-expansion predictions of Bak, Krinsky, and Mukamel, which hitherto have been successfully applied to a number of n>~4 systems and according to which the transitions should be of first order. © 1979 The American Physical Society.
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页码:1378 / 1382
页数:5
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