Hydrogen in the A15 compound V3Ga : 51V and 1H nuclear magnetic resonance study

Abstract Nuclear magnetic resonance (NMR) measurements of the 51 V and 3 H spin-lattice relaxation times and the 51 V Knight shifts in the A15-type compounds V 3 GaH x ( x = 0, 0.5 and 1.67) have been performed over the temperature range 11–450 K. The 51 V NMR data show that the density of electron states at the Fermi level decreases strongly with increasing x . For both samples with x > 0 the proton free-induction decay has two well-resolved components in the range 180–380 K, indicating the presence of mobile and static H atoms on the NMR frequency scale.