Specific heat studies for λ-(BEDT-TSF)2FeCl4

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

Research output: Contribution to journalConference articlepeer-review

20 Citations (Scopus)


We have measured the specific heat on λ-(BEDT-TSF)2FeCl4 as a function of temperature by a thermal relaxation method to study the metal-to-insulator (MI) transition around 8K and anomalous ferroelectric-like state revealed by microwave measurements for the metallic state. The specific heat exhibits a sharp peak due to the antiferromagnetic ordering at TMI=8.3K. We have found a remarkable jump at 70K labeled as TFM. Together with the ferroelectric-like response emerging around TFM, this result confirms thermodynamically a ferroelectric-like transition at TFM in the metallic states. Furthermore, the thermal conductance of the sample may exhibit an anomaly at TFM.

Original languageEnglish
Pages (from-to)555-556
Number of pages2
JournalSynthetic Metals
Publication statusPublished - 2003 Mar 13
EventISCOM 2001 - Rusutsu, Hokkaido, Japan
Duration: 2001 Sept 102001 Sept 14


  • Antiferromagnitic order
  • Metal-to-insulator transition
  • Specific heat
  • Thermal conductivity
  • λ-(BEDT-TSF)FeCl
  • π-d interaction


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