SPIN-WAVE COLLAPSE AND INCOMMENSURATE FLUCTUATIONS IN URU2SI2

被引:15
作者
BUYERS, WJL
TUN, Z
PETERSEN, T
MASON, TE
LUSSIER, JG
GAULIN, BD
MENOVSKY, AA
机构
[1] RISO NATL LAB, DK-4000 ROSKILDE, DENMARK
[2] MCMASTER UNIV, HAMILTON L8S 4M1, ONTARIO, CANADA
[3] UNIV AMSTERDAM, 1018 XE AMSTERDAM, NETHERLANDS
关键词
D O I
10.1016/0921-4526(94)91746-9
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
To test if the T(N) = 17.7 K transition in URu2Si2 is driven by a divergence of a magnetic order parameter we performed high-resolution neutron scattering. At the ordering wave vector the spin-wave energy collapsed. and the susceptibility diverged as T(N) was approached. This confirms that the order parameter is the magnetic dipole, as shown by recent symmetry arguments and polarized neutron experiments [1]. We also observe incommensurate fluctuations, suggesting that competing temperature-dependent interactions may influence this weak-moment transition.
引用
收藏
页码:95 / 97
页数:3
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