Novel electronic properties under magnetic fields in organic conductors λ-(BETS)2FexGa1−xCl4

Abstract Electronic states have been investigated under high magnetic fields for quasi-two-dimensional organic conductors λ-(BETS) 2 Fe x Ga 1− x Cl 4 ( x =1.0, 0.47, 0.45, 0; BETS: bis(ethylenedithio)tetraselenafulvalene). Under magnetic field parallel to the c -axis, various electronic states appear, depending on x , field, and temperature. The global phase diagram for this alloy is presented and the evidence of the strong internal field due to the Fe moments is shown.