Spin-lattice relaxation rates of 2D in C15-type TaV2D0.5 and TaV2D1.3 were measured at 20 to 424K. A relaxation-rate peak was detected near to room temperature. This peak was caused by a jump process that was responsible for the long-range diffusion of D atoms. Below 130K, the spin-lattice relaxation became 2-exponential; thus indicating the coexistence of 2 types of D atoms with differing low-temperature mobilities. The fast component of the relaxation rate exhibited an additional low-temperature peak. This component could be associated with D atoms involved in fast local motion. It was found that the temperature dependence of the atom-jump frequency for the local motion did not obey an Arrhenius-type equation.

Nuclear Magnetic Resonance Study of Deuterium Mobility in TaV2Dx and HfMo2Dx Compounds. A.V.Soloninin, A.V.Skripov, A.P.Stepanov, V.N.Kozhanov: Physics of Metals and Metallography, 2002, 94[2], 185-92