Crystal Field and Magnetoelastic Interactions in Tb2Ti2O7
  In terms of a semi-phenomenological exchange charge model, we have obtained estimates of parameters of the crystal field and parameters of the electron-deformation interaction in terbium titanate Tb2Ti2O7 with a pyrochlore structure. The obtained set of parameters has been refined based on the analysis of spectra of neutron inelastic scattering and Raman light scattering, field dependences of the forced magnetostriction, and temperature dependences of elastic constants. 
Vera Klekovkina and Boris Malkin
cond-mat.str-el physics.comp-ph