Author/Authors :
Negishi، نويسنده , , E. and Uozaki، نويسنده , , H. and Ishizaki، نويسنده , , Y. and Tsuchiya، نويسنده , , H. and Endo، نويسنده , , S. and Abe، نويسنده , , Y. and Matsui، نويسنده , , H. and Toyota، نويسنده , , N.، نويسنده ,
Abstract :
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 8 K 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=8.3 K. We have found a remarkable jump at 70 K 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.
Keywords :
thermal conductivity , specific heat , Metal-to-insulator transition , ?-(BEDT-TSF)2FeCl4 , Antiferromagnitic order , ?–d Interaction
