The 6Li and 7Li two-time spin-alignment echo NMR correlation functions of

single-crystalline Li3N were recorded. Around room temperature, the decay of the

spin-alignment echo amplitudes was induced by slow Li jumps perpendicular to the

Li2N layers. The hopping correlation functions can be best represented by a single

exponential. The measured jump rates were consistent with those which were

previously determined by 8Liβ-radiation detected NMR at much lower

temperatures. Taking the results from 6Li and 7Li NMR as well as from 8Liβ-NMR

together, between 360 and 220K Arrhenius behaviour was found. The

corresponding activation energy was 0.65eV and the pre-exponential factor was 6.4

x 1013/s. Although probed from a microscopic point of view, the NMR diffusion

parameters were in very good agreement with those obtained from dc conductivity

measurements, being sensitive to macroscopic transport properties.

Diffusion Parameters in Single-Crystalline Li3N as Probed by 6Li and 7Li Spin-

Alignment Echo NMR Spectroscopy in Comparison with Results from 8Li Β-

Radiation Detected NMR. M.Wilkening, D.Gebauer, P.Heitjans: Journal of Physics

- Condensed Matter, 2008, 20[2], 022201