The NQR Observation of Spin-Peierls Transition in an Antiferromagnetic MX-Chain Complex [NiBr(chxn)2]Br2

Shinya Takaishi, Yasuhiro Tobu, Hiroshi Kitagawa, Atsushi Goto, Tadashi Shimizu, Takashi Okubo, Tadaoki Mitani, Ryuichi Ikeda

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40 Citations (Scopus)

Abstract

81Br Nuclear quadrupole resonance (NQR) measurement was performed in an S = 1/2 one-dimensional Heisenberg antiferromagnetic metal complex [NiBr(chxn)2]Br2 (chxn: 1R,2R-diaminocyclohexane), having a halogen-bridged MX chain structure -Br-Ni3+-Br-Ni3+-Br-. Two 81Br NQR signals were observed below 40 K, while a single signal was observed above 130 K, showing the presence of two nonequivalent bridging Br sites below 40 K. This NQR result together with previously reported magnetic susceptibility and X-ray results indicate the occurrence of a transition into a spin-Peierls state between 40 and 130 K. This communication reports the first spin-Peierls transition in metal complexes in which pure d electrons contribute to the magnetism. In addition, we demonstrated a new experimental method for studying a spin-Peierls system.

Original languageEnglish
Pages (from-to)1614-1615
Number of pages2
JournalJournal of the American Chemical Society
Volume126
Issue number6
DOIs
Publication statusPublished - 2004 Feb 18
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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