High Resolution X-Ray Scattering Study of the Anion Ordering Phase Transition of (TMTSF)2ClO4

Jean Paul Pouget, Tetsuo Nakajima, Seiichi Kagoshima, Tsuyoshi Tamegai, Yoshio Nogami, Koichi Kubo, Klaus Bechgaard

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

The anions of (TMTSF)2ClO4 order below about 24 K. The speed at which this transition is passed has a drastic influence on the low temperature electronic properties of this salt. We determined as a function of the cooling rate the number of ordered ClO4 as well as the average size of the ordered domains. A high resolution X-ray synchrotron radiation study showed that this transition exhibited very unusual features probably due to the coupling of the anions with angular deformations of the Bravais lattice during the ordering process. We investigated also the kinetics of the Ising order parameter describing the anion ordering by a study of the temporal evolution of a superlattice reflection during thermal annealing of quenched samples.

Original languageEnglish
Pages (from-to)2036-2053
Number of pages18
Journaljournal of the physical society of japan
Volume59
Issue number6
DOIs
Publication statusPublished - 1990
Externally publishedYes

Keywords

  • X-ray scattering
  • anion ordering
  • superlattice reflection,thermal annealing
  • synchrotron radiation
  • thermal quenching

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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