Impurity effect in a novel spin-Peierls compound TiOBr

T. Sasaki, M. Yamazawa, K. Takahashi, T. Nagai, T. Asaka, Y. Matsui, J. Akimitsu

Research output: Contribution to journalArticlepeer-review


We have performed magnetic susceptibility and electron diffraction measurements on impurity effect in a novel spin-Peierls system TiOBr, i.e. Ti1 - x Scx OBr. The impurity-induced antiferromagnetic long-range order found in Cu1 - x Znx GeO3 could not be observed in this system. A number of unpaired spins induced by the impurities can be explained by a simple model that one Sc impurity creates one S = frac(1, 2) spin up to the threshold concentration, xc ∼ 0.025. The induced impurity suppresses the spin-Peierls transition temperature, Tc 1 and the spin-Peierls phase disappears at xt ∼ 0.028, although the incommensurate state still persists above xt. Both values agree well with each other.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalPhysica B: Condensed Matter
Issue number1
Publication statusPublished - Aug 15 2006
Externally publishedYes


  • Electron diffraction
  • Impurity
  • Incommensurate
  • Spin-Peierls
  • TiOBr

ASJC Scopus subject areas

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


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