Magnetic behavior and structure of the halogen-doped fullerene C60

Abstract
We simultaneously doped bromine and iodine (electron acceptors) into C60 (fullerene) which is known to become superconductive by doping alkali metals (electron donors). The simultaneous doping of bromine and iodine into C60 brought about a hysteresis in the magnetic moment versus magnetic field curves as well as a structural change when the molar ratio of IBr (the 1:1 compound of iodine and bromine) to C60 is over about 2.5.