Evidence for a hidden order parameter in URu2Si2

被引：3
|
作者：
Bourdarot, F.
Fak, B.
Habicht, K.
Prokes, K.
机构：
[1] CEA, Dept Rech Fondamentale Mat Condensee, SPSMS MDN, F-38054 Grenoble 9, France
[2] BENSC, Hahn Meitner Inst, D-14109 Berlin, Germany
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
heavy fermion; spin fluctuations; neutron scattering;
D O I：
10.1016/j.jmmm.2003.11.129
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured the field dependence of the ordered antiferromagnetic moment and the magnetic excitations in URu2Si2 for fields up to 17 T applied along c axis, using neutron scattering. The decrease of the magnetic intensity of the tiny moment m with increasing field does not follow a simple power law, but shows a clear inflection point, suggesting that the moment m is connected to a hidden order parameter Psi. The magnetic excitation gap at Q = (1, 0, 0) increases continuously with increasing field, while that at Q = (1, 4, 0, 0) is nearly constant. (C) 2003 Published by Elsevier B.V.
引用
收藏
页码：E31 / E32
页数：2
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