The paramagnetic spectral response fromLiV2O4

Abstract

At low temperatures LiV2O4 exhibits short range paramagnetic correlations, peaked on momentum transfer . A marked evolution in the spectral intensity towards lowQ values () and low energy transfers ω is observed as the temperature is increased above 2 K (to K and higher). The form of the spectral response is rather complex, requiring at least twospectral components to describe the scattering over the relatively small energyrange investigated. We show that the observed paramagnetic spin fluctuations inLiV2O4, i.e. the spin degrees of freedom, can account reasonably well for its large specific heat coefficientγ (= C/T).