Spatial mapping of mobility and density of the conduction electrons in (FA)(2)PF6

Novel implementation of the Fourier imaging technique on conduction electro n spins in the one-dimensional organic conductors (FA)(2)PF6 (FA: fluoranth ene) is reported. Two-dimensional spatial imaging of resolution 30 mu m(2) is combined with the pulsed-gradient spin-echo technique, to derive maps re vealing the local properties of the electron spin density and mobility. The maps generally show pronounced inhomogeneity of both density and mobility on the scale of similar to 30-300 mu m. Highly mobile regions were identifi ed to exist, and the mobility in these was quantitatively evaluated by a ba sic theoretical model of restricted diffusion.