SPIN-WAVE DISPERSION CURVE IN THE 2-DIMENSIONAL ANTIFERROMAGNET KFEF4

被引：3

作者：

DESERT, A ^{[1
]}

BULOU, A ^{[1
]}

NOUET, J ^{[1
]}

HENNION, B ^{[1
]}

PETITGRAND, D ^{[1
]}

机构：

[1] CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 83卷 / 07期

关键词：

D O I：

10.1016/0038-1098(92)90047-D

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic properties of the two-dimensional antiferromagnet KFeF4 have been studied by inelastic neutron-scattering. The spin-wave dispersion curve is measured in the (hhl) plane at 15K. The existence of a gap (0.65THz) is confirmed. The dispersion along the [00-xi] direction, normal to FeF6 sheets is smaller than the experimental accuracy; on the other hand a strong dispersion is observed along the [xi-xi-0] direction. The dispersion curves are well described by a simple spin-wave theory (H(E) = 211 T, H(A) = 1.3 T, \J\ = 9.8 cm-1 alpha = 6.2 x 10(-3)).

引用

页码：505 / 508

页数：4

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