Neutron spin-echo study of URu2Si2

被引：6

作者：

Fåk, B

Farago, B

van Dijk, NH

机构：

[1] CEA, MDN, SPSMS, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[3] Delft Univ Technol, Inst Interfac Reactor, Radiat Phys Grp, NL-2629 JB Delft, Netherlands

来源：

PHYSICA B-CONDENSED MATTER | 1999年 / 259-61卷

关键词：

neutron spin-echo; weak antiferromagnetism; magnetic correlations;

D O I：

10.1016/S0921-4526(98)00791-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the magnetic correlations in the heavy-fermion superconductor URu2Si2 using high-resolution neutron spin-echo techniques. The measurements confirm previous results that the weak ordered moment flips the neutron spin, and hence is of dipolar origin. The spin-echo signal, with an energy resolution two orders of magnitude better than earlier neutron experiments, confirms the static nature of the moment, in agreement with muon measurements. In addition, we found evidence for the presence of rapidly fluctuating magnetic moments in the ordered phase, which an most likely at the origin of the enhancement of the linear term in the specific heat at low temperatures. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：644 / 645

页数：2

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