Inelastic x-ray scattering to investigate spin-lattice hybrid excitations in the spinel GeCo2O4

This proposal aims at using inelastic x-ray scattering to study in detail the nuclear contribution to the spin-lattice hybrid excitation previously observed in the spinel GeCo2O4 by inelastic neutron scattering with polarization analysis. The goal is first to check its phononic nature, then track its dispersion and temperature dependence in order to confirm the presence of a spin-lattice coupling in this compound.