NMR of 51V in the Antiferromagnetic State of V5S8

Nuclear magnetic resonance of 51 V has been investigated in the antiferromagnetic state of polycrystalline V 5 S 8 at liquid helium temperatures. Two signals with hyperfine fields of 10.1±0.1 kOe and 14.7±0.1 kOe, and one without hyperfine field but with a shift of 2.5±0.5 were observed and assigned to the three different vanadium sites. The magnitudes of the moments estimated are 0.15µ B , 0.22µ B and 0µ B for the three sites in the antiferromagnetic state. This suggests V 5 S 8 is a three-dimensional weakly magnetic system.