Title :
Suppression of insulating state in (BETS)/sub 2/FeCl/sub 4/ by magnetic field
Author :
Goze, F. ; Laukhin, V.N. ; Brossard, L. ; Audouard, A. ; Utmet, J.P. ; Askenazy, S. ; Naito, Tomoyuki ; Kobayashi, Hideo ; Kobayashi, Akihiro ; Tokumoto, Mitsuhiro ; Faulmann, C. ; Cassoux, P.
Author_Institution :
The University of Tokyo
Abstract :
Summary form only given. Electrical and magnetotransport properties of the first organic conductor (BETS)/sub 2/FeCl/sub 4/ (BETS = bis(ethylenedithio)tetraselenafulvalene) with magneticions Fe/sup 3+/ are reported. It has been revealed that the sharp metal-insulator phase transition at 8 K, which is driven by the antiferromagnetic interaction between the Fe/sup 3+/ ions in this compound at ambient pressure, is suppressed by the magnetic field H /spl ges/ 10 T. This unusual phenomenon is connected with a plausible ferromagnetic ordering of the Fe/sup 3+/ ions momentums, which is induced by the field. It could result in some kind of evaporation of the previously condensed conduction electrons into a high conductivity state. Temperature-magnetic field (T - H) phase diagram is presented.
Keywords :
Antiferromagnetic materials; Conductivity; Electrons; Insulation; Magnetic fields; Metal-insulator structures;
Conference_Titel :
Science and Technology of Synthetic Metals, 1994. ICSM '94. International Conference on
Conference_Location :
Seoul, Korea
DOI :
10.1109/STSM.1994.834901
