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

fYear

1994

fDate

24-29 July 1994

Firstpage

143

Lastpage

143

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Science and Technology of Synthetic Metals, 1994. ICSM '94. International Conference on

Conference_Location

Seoul, Korea

Type

conf

DOI

10.1109/STSM.1994.834901

Filename

834901