LONGITUDINAL SPIN FLUCTUATIONS IN QUASI-2D ANTIFERROMAGNETS

被引：13
|
作者：
BRAUNE, S [1 ]
MALEEW, SW [1 ]
机构：
[1] LENINGRAD NUCL PHYS INST, LENINGRAD 188353, USSR
来源：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 81卷 / 01期
关键词：
D O I：
10.1007/BF01454215
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The longitudinal fluctuations (LF) in quasi-2 D antiferromagnets are considered. The temperature and frequency dependence of the longitudinal susceptibility is determined. The contribution of the LF to the inelastic neutron scattering is discussed and it is shown that it has to be taken into account in some cases. If spin-wave interaction is neglected the staggered susceptibility diverges at k=0 and ω»0. As a result, the spin-wave interaction should be considered. It is shown that the critical dimension for this problem is equal to three and four for T=0 and T≠0, respectively. © 1990 Springer-Verlag.
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页码：69 / 73
页数：5
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