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.

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页码：E31 / E32

页数：2

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