Three-dimensional cylindrical X-band ESR imaging by a combined pulsed gradient Fourier and static gradient projection reconstruction method.

Static gradient electron spin echo projection reconstruction imaging is favourable for X-band material science applications requiring temperature variation with a metal cryostat. To prevent imaging artefacts due to the high conduction electron diffusion coefficient in the preferred conduction direction of quasi-one-dimensional conductors, only pulsed gradient phase encoding for that direction can be tolerated. We present results of an appropriate cylindrical imaging scheme combining both methods. Conduction electron spin density images with 13 x 13 x 17 microm(3) volume element size or spin-lattice relaxation time images with inversion recovery sequence and 13 x 13 x 68 microm(3) volume element size are presented for fluoranthene radical cation salt single crystals of typical sizes of 0.4 x 0.4 x 1 mm(3).