A theoretical study of magnetic excitations in disordered spin-Peierls systems

被引：1
作者：
Saito, M [1 ]
Fukuyama, H [1 ]
机构：
[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1999年 / 60卷 / 8-9期
基金：
日本学术振兴会;
关键词：
magnetic materials; oxides; defects; magnetic properties; phase transitions;
D O I：
10.1016/S0022-3697(99)00063-3
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
It is now established that disorder in a spin-Peierls system can result in long-range-ordered staggered moments, whose amplitudes vary spatially, In such a system two kinds of magnetic excitations are expected due to antiferromagnetic orderings and dimerization. We investigate them phenomenologically and obtain gapless antiferromagnetic spin wave mode and gapped dimerization mode with intrinsic broadenings. These results are compared with experiments. (C) 1999 Elsevier Science Ltd. All rights reserved.
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页码：1113 / 1115
页数：3
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