Metal-insulator transitions in magnetic conductor λ-(BEDT-TSF)2FeCl4 studied by 1H and 77Se NMR

S. Endo, T. Goto, T. Fukase, H. Matsui, H. Uozaki, H. Tsuchiya, E. Negishi, Y. Ishizaki, Y. Abe, N. Toyota

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


We have performed 1H and 77Se NMR measurements on a π-d organic metal λ-(BEDT-TSF)2FeCl4 containing paramagnetic ions Fe3+. It is found from 1H NMR measurements that the resonance line starts to split around TFM=70K, just a temperature where a ferroelectric-like transition occurs, and with further decreasing temperature, the spectrum becomes significantly broad near the metal-insulator transition TMI=8.3K. From 77Se NMR measurements, near the phase boundary between the forced-ferromagnetic metallic state and the canted antiferromagnetic insulating state at 1.6K and 11.67T, a single peak becomes split with two new peaks emerging at the both sides of the zero-shift.

Original languageEnglish
Pages (from-to)557-558
Number of pages2
JournalSynthetic Metals
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sep 102001 Sep 14


  • Antiferromagnetic order
  • Ferroelectric-like transition
  • H and Se NMR
  • Metal-to-insulator transition
  • λ-(BEDT-TSF)FeCl

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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