2-MAGNON RAMAN-SCATTERING IN CUGEO3 WHICH UNDERGOES SPIN-PEIERLS TRANSITION

被引：21

作者：

SUGAI, S

机构：

[1] Department of Physics, Faculty of Science, Osaka University, Toyonaka 560

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 11期

关键词：

D O I：

10.1143/JPSJ.62.3829

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic properties of CuGeO3 were investigated by Raman scattering. Broad two-magnon scattering extending over 2000 cm-1 develops below 200 K. This wide energy indicates that the spins are two-dimensional, that is, the interchain ferromagnetic exchange energy is ten times larger than the intrachain antiferromagnetic exchange energy. The two-dimensionality is against the current interpretation of the spin-Peierls transition. The intensity below 1000 cm-1, especially below 100 cm-1, decreases below 50 K due to the dimeric lattice distortion.

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页码：3829 / 3831

页数：3

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