Anisotropy of the self-diffusion tensor in nematic MBBA

The temperature dependence of the anisotropy of the self-diffusion constant tensor in nematic DMBBA was determined by a multiple pulse NMR spin echo technique. The measured anisotropy $\text{D}{}_6\text{D⊥}\text{= 1.4}$ in the partially ordered nematic system was related to the anisotropy $\text{D}{}_{\mathrm{O}}\text{6}\text{D}{}^{\mathrm{O}}\text{⊥}\text{= 2.2}$ in the perfectly ordered system.