Powder Spectra of 51V NMR in CuV2S4: Possible Coexistence of Charge and Spin Density Waves

Abstract

Abstract NMR experiments are reported for the copper chalcogenide spinel CuV2S4 , which has incommensurate lattice distortions at low temperatures in spite of the cubic symmetry at high temperature. A broad spin-echo spectrum of 51V has been observed below 90 K at 17 MHz. but it shows a remarkable frequency dependence where it becomes sharper with decreasing frequency. Possible coexistence of charge and spin density waves is suggested at low temperatures in this material.