LOW-TEMPERATURE H-1-NMR STUDY OF ELECTRONIC-STRUCTURE PARAMETERS (T(1)(E)T) IN ZIRCONIUM DIHYDRIDE

Measurements of the proton-spin-lattice relaxation times (T1) are reported for zirconium dihydrides: ZrH1.87, ZrH1.93 and ZrH2.00 at nominal frequency of 41 MHz, with emphasis on the low temperature (4.2-25 K) behaviour of the T1. The dominant contributions are originated from the hyperfine interactions of the protons with the conduction electrons and the paramagnetic impurities. The (T1eT)-1/2 values determined from the low temperature range (4.2-25 K) agree with those obtained in the extended range (4.2-300 K) as well as with the values reported by the other researchers. The paramagnetic impurity contribution is found to be small and temperature independent.