Spin fluctuation inLiV2O4studied by muon spin relaxation

Abstract

Muon spin relaxation $\left(\mu \mathrm{SR}\right)$ measurements are reported on a polycrystalline sample of ${\mathrm{LiV}}_2{\mathrm{O}}_4$ at temperatures down to 20 mK. No sign of magnetic order was found over the investigated range of temperature, proving the high quality of the sample. The $\mu \mathrm{SR}$ signal at lower temperature is clearly composed of two components with almost equal partition, suggesting the presence of inequivalent local magnetic moments at V sites. This is in favor of mechanisms other than those based on the Kondo effect for an anomalously enhanced electronic density of states in ${\mathrm{LiV}}_2{\mathrm{O}}_4.$