Longitudinal And Transverse Diffusion Of Conduction-Electron Spins On Stacks Of Fluoranthene Radical Cations

The temperature dependence and anisotropy of the conduction-electron spin diffusion coefficient D(T) of three single crystals of the organic conductor (fluoranthene)(2)PF6 with defect content varying between 7x10(-5) and 1% per formula unit have been determined. D-parallel to/D-perpendicular to varies between 2x10(4) and 100 in the metallic phase. The defect dependences of the Peierls transition, microwave conductivity, magnetic susceptibility, and transverse relaxation rate are presented as well and their relations are discussed.