NMR OF V-51 IN VRUP - POSSIBLE ONSET OF CHARGE-DENSITY-WAVES

NMR experiments are reported for VRuP which has an orthorhombic TiNiSi structure and shows anomalies in the temperature dependence of the el ectric conductivity and static susceptibility. A field-swept spectrum of V-51 perturbed by a quadrupole interaction has been observed, which shows no anomalous temperature dependence. However, the metallic spin -lattice relaxation rate decreases in a stepwise fashion with decreasi ng temperature at around 200 K, in accordance with the resistivity and the susceptibility data, suggesting a possible CDW formation in this material.