CuGeO3 and CuO by respectively elastic and inelastic polarized neutrons

Inelastic polarization analysis under applied magnetic field permitted to study the triplet magnon-like mode of spin-Peierls CuGeO3. This mode splits in three, as expected. Intensities of inelastic neutron scattering measurements with polarization analysis have been collected in both spin-flip and nonspin-flip channels. This Zeeman splitting revealed that two out of the three processes are purely spin-flip excitations, while the third undisplaced one is a nonspin-flip process in which the neutron conserves its spin orientation.