ENERGY GAPS IN THE SPIN-WAVE DISPERSION OF THE LINEAR ANTI-FERROMAGNET TMMC

被引：26
作者：
HEILMANN, IU
BIRGENEAU, RJ
ENDOH, Y
REITER, G
SHIRANE, G
HOLT, SL
机构：
[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139
[2] UNIV WYOMING,DEPT CHEM,LARAMIE,WY 82070
来源：
SOLID STATE COMMUNICATIONS | 1979年 / 31卷 / 09期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0038-1098(79)90307-7
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
By means of neutron scattering, we have measured magnetic excitations in the linear-chain antiferromagnet TMMC at T =1.8 K. An energy gap is observed at q=0 associated with zz-spin correlations, thus giving direct evidence for the importance of the dipolar xy anisotropy for the spin dynamics at low temperatures. A finite magnetic field applied perpendicular to the chains creates a second q=0 gap. There are substantial discrepancies between field dependence of the spin-wave dispersion and the predictions of linear spin-wave theory. © 1979.
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收藏
页码：607 / 610
页数：4
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