Neutron scattering studies of the cooperative paramagnet pyrochlore Tb2Ti2O7

We have carried out extensive neutron-scattering studies on the pyrochlore antiferromagnet Tb2Ti2O7 in both polycrystalline and single-crystal form. This insulating material belongs to a family of rare-earth titanate pyrochlores, R2Ti2O7, whose magnetic rare-earth ions reside on a network of comer sharing tetrahedra. Such a local geometry is known to give rise to geometrical frustration in the presence of antiferromagnetic interactions. Earlier …