NUCLEAR-SPIN RELAXATION IN ELECTROLYTE GLASSES

Nuclear spin relaxation (NSR) experiments in the laboratory and rotati ng frame were performed between about 2 K and room temperature in the following electrolyte glasses: LiCl.7H(2)O, LiBr.7H(2)O, ZnCl2.7H(2)O, and NaOH.7H(2)O. The data exhibit common features for all the glasses independent of the probe nuclei. In the low temperature region below T-, the temperature and frequency dependence of the NSR data obey app roximately a power law of the form 1/T-1 proportional to T(1+alpha)ome ga(-beta), which can be interpreted consistently in the framework of l ow-frequency excitations of disorder modes. Above T-, the NSR rates b ecome dominated by diffusive motion of alkali ions resulting in an asy mmetric relaxation rate peak near T-g. The findings were analyzed by m eans of a non-Debye relation for the motion-induced NSR.