Author/Authors :
Goze، نويسنده , , F. and Laukhin، نويسنده , , V.N. and Brossard، نويسنده , , L. and Audouard، نويسنده , , A. and Ulmet، نويسنده , , J.P. and Askenazy، نويسنده , , S. and Naito، نويسنده , , T. and Kobayashi، نويسنده , , H. and Kobayashi، نويسنده , , A. and Tokumoto، نويسنده , , M. and Cassoux، نويسنده , , P.، نويسنده ,
Abstract :
We report on the magnetotransport properties, up to 37 T, of the first organic conductor containing magnetic Fe3+ ions, λ-(BETS)2FeCl4, where BETS is bis(ethylenedithio)tetraselenafulvalene. The previously reported very sharp metal-insulator phase transition, which occurs at 8 K under ambient pressure, is suppressed when applying magnetic fields > 10 T. This unusual phenomenon may be connected to a field-induced ferromagnetic ordering of the Fe3+ ion moments. This could result in some kind of “evaporation” of the previously condensed carriers, into a field-restored highly conducting state (FRHCS). In this ground state, angular dependence of the magnetoresistance is observed for current flowing perpendicularly to the best-conduction c axis.
