Electron diffraction study of an inorganic spin-Peierls system CuGeO 3

Osamu Kamimura, Masami Terauchi, Michiyoshi Tanaka, Osamu Fujita, Jun Akimitsu

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

An electron diffraction study of an inorganic spin-Peierls system CuGeO3 was performed. Weak superlattice reflections indexed by (h/2)k(l/2)(h, k, l: odd) are observed in electron diffraction patterns taken at about 10 K with the [100] electron incidence. The reflections are interpreted as characteristic of a superlattice structure of the space group Bbcm or Bbmm with cell dimensions a′ ≃ 2a, b′ ≃ b and c′ ≃ 2c and with dimerization of Cu atoms along the quasi-one-dimensional [001] or the [010] direction, which is strong evidence of the spin-Peierls transition. Strong diffuse streaks which run along the c*-direction through the fundamental reflections are observed at the same temperature. The streaks are attributed to low-frequency transverse acoustic waves of the oxygen octahedra and can be precursors to another phase transformation below the spin-Peierls transition.

Original languageEnglish
Pages (from-to)2467-2471
Number of pages5
JournalJournal of the Physical Society of Japan
Volume63
Issue number7
Publication statusPublished - Jul 1994
Externally publishedYes

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electron diffraction
dimerization
phase transformations
diffraction patterns
incidence
low frequencies
acoustics
oxygen
cells
atoms
electrons
temperature

Keywords

  • CuGeO
  • Diffuse streaks
  • Dimerization
  • Electron diffraction
  • Spin-Peierls transition
  • Superlattice reflections

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electron diffraction study of an inorganic spin-Peierls system CuGeO 3 . / Kamimura, Osamu; Terauchi, Masami; Tanaka, Michiyoshi; Fujita, Osamu; Akimitsu, Jun.

In: Journal of the Physical Society of Japan, Vol. 63, No. 7, 07.1994, p. 2467-2471.

Research output: Contribution to journalArticle

Kamimura, O, Terauchi, M, Tanaka, M, Fujita, O & Akimitsu, J 1994, 'Electron diffraction study of an inorganic spin-Peierls system CuGeO 3 ', Journal of the Physical Society of Japan, vol. 63, no. 7, pp. 2467-2471.
Kamimura, Osamu ; Terauchi, Masami ; Tanaka, Michiyoshi ; Fujita, Osamu ; Akimitsu, Jun. / Electron diffraction study of an inorganic spin-Peierls system CuGeO 3 . In: Journal of the Physical Society of Japan. 1994 ; Vol. 63, No. 7. pp. 2467-2471.
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N2 - An electron diffraction study of an inorganic spin-Peierls system CuGeO3 was performed. Weak superlattice reflections indexed by (h/2)k(l/2)(h, k, l: odd) are observed in electron diffraction patterns taken at about 10 K with the [100] electron incidence. The reflections are interpreted as characteristic of a superlattice structure of the space group Bbcm or Bbmm with cell dimensions a′ ≃ 2a, b′ ≃ b and c′ ≃ 2c and with dimerization of Cu atoms along the quasi-one-dimensional [001] or the [010] direction, which is strong evidence of the spin-Peierls transition. Strong diffuse streaks which run along the c*-direction through the fundamental reflections are observed at the same temperature. The streaks are attributed to low-frequency transverse acoustic waves of the oxygen octahedra and can be precursors to another phase transformation below the spin-Peierls transition.

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