Magnetism of decagonal Al69.8Pd12.1Mn18.1

We report the results of measurements of 27Al NMR spectra and the DC susceptibility of polycrystalline decagonal quasicrystalline Al69.8Pd12.1Mn18.1. The temperature variation of the magnetic susceptibility *y(T) and the 27Al NMR-spectra imply that a fraction of the order of 20% of the Mn-atoms carry a magnetic moment, and that a spin-glass-type freezing of these Mn moments occurs at Tf = 12 K. The NMR spectra reveal two partially resolved lines for the 27Al nuclei, indicating that there are two different sets of local environments for the Al-sites. Below 100 K and upon decreasing temperatures, the 27Al-NMR line width *D increases with a progressively increasing negative slope d*D/AT, as it is often observed in relation with spin-glass freezing processes.