Ordering Phenomena in Transition Metal Oxides

Spin excitations in cuprates and cobaltates   

We will present inelastic neutron scattering data on layered copper oxides, which speak directly to the existence and nature of charge-ordered phases in these materials and their competition with superconductivity. Recent Raman scattering experiments in high magnetic fields yielding complementary information will also be discussed. In addition, we will present inelastic neutron scattering data on antiferromagnetic Na_0.82CoO₂, the unhydrated precursor compound of the newly discovered superconductor Na_xCoO₂ 0yH₂O.