Sample dependence of anisotropy and restriction of electron-spin diffusion in the quasi-one dimensional organic conductor (fluoranthene) $\mathsf{_2}$ PF $\mathsf{_6}$

Abstract

As-grown and proton-irradiation damaged crystals of the quasi-one dimensional organic conductor (fluoranthene) 2PF 6 are studied by static magnetic field gradient spin echo electron spin resonance. The parallel-to-stack diffusion constant $D_{\parallel}$ varies sample dependent by a factor of 50, just like the ratio $D_{\parallel}/D_{\bot}$ . The restriction of free diffusive motion of the conduction electron spins of as-grown and microstructured crystals is analyzed. Copyright Springer-Verlag Berlin/Heidelberg 2003