Two-Magnon Raman Scattering in CuGeO_3 Which Undergoes Spin-Peierls Transition
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概要
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Magnetic properties of CuGeO_3 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 1000cm^<-1>, especially below 100cm^<-1>, decreases below 50 K due to the dimeric lattice distortion.
- 社団法人日本物理学会の論文
- 1993-11-15
著者
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Sugai S
Osaka Univ. Osaka
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Sugai Shunji
Department Of Physics Division Of Material Science Nagoya University
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