Magnetic excitations in CuGeO3

M. Nishi, O. Fujita, J. Akimitsu, K. Kakurai, Y. Fujii

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In the inorganic spin-Peierls compound CuGeO3, we found a pronounced anisotropic magnetic energy dispersion, i.e. intra-chain exchange Jc ≈ 10.4 meV, inter-chain exchanges Jb ≈ 0.1 Jc and Ja ≈ - 0.01Jc and gap energy 2.1 meV extrapolated to T = 0 K. We also observed critical scattering at (0, 1, 1/2) above Tsp. The ratio of the correlation lengths ξcb is in good agreement with that obtained from X-ray scattering at (1/2, 1, 1/2) by Pouget et al. This fact suggests that the Cu2+ spins fluctuate to form singlet-pair short-range order, but not to form ordinary antiferromagnetic order above Tsp.

Original languageEnglish
Pages (from-to)275-277
Number of pages3
JournalPhysica B: Physics of Condensed Matter
Volume213-214
Issue numberC
DOIs
Publication statusPublished - Aug 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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