Deuterium NMR in YMn2Dx compounds - art. no. 104403

The NMR investigations of YMn2Dx (x = 0.65, 1.0,1.5,2.0,2.5) deuterides are presented and discussed. The observations of D-2 spin echo signals were ma de for the samples in the paramagnetic state in the temperature ranges clos e above their magnetic ordering temperatures. The temperature dependencies of D-2 resonance frequency, T-1 and T-2 relaxation times at the ordering te mperature show a divergence which is dependent on the deuterium concentrati on. It is shown that the mechanisms of conduction electron interaction and of dipolar or orbital interactions are responsible for the observed relatio ns between Knight shift and the susceptibility. The observed concentration dependent relaxation rates are explained on the basis of extended theory of spin fluctuations.