抄録
The nuclear spin-lattice relaxation time, T1, and spin-echo phase-memory time of V51 and Co59, and the Knight shift of Co59 in VCo alloy have been studied at liquid He4 temperatures in Co concentration from 0.2 to 6.0 at %. A positive Knight shift of Co59, 1.57±0.05(%), is indicative of a dominant orbital hyperfine interaction. With increasing Co concentration, T1T of V51 increases gradually. T1T of Co59 is larger than that of V51 in 0.2 at % Co alloy and decreases rapidly with Co concentration. It is concluded that the density of states at the Fermi level at Co site is smaller than that of the host element and increases with Co concentration in contrast to the decrease of the bulk density of states. The spin-echo phase-memory decays of Co59 and V51 are found to correspond to a nearly Gaussian and a Lorentzian line shape, respectively.
