Single crystal magnetic susceptibility of the quasi-one-dimensional organic conductor (fluoranthene) 2PF6

Magnetic susceptibility was measured on a bundle of single crystals of difluoranthene phosphor hexafluoride (FA)₂^·+PF₆^?] with external field parallel or perpendicular to the molecular stacking direction. Except for lowest temperatures, where the paramagnetic contribution of sample defects is of importance, magnetic susceptibility is dominated by the strongly anisotropic molecular diamagnetism. Spin paramagnetism is separated in the metallic and semiconducting phase and compared with magnetic resonance results and predictions of available models.