Neutron scattering study of crystal fields in (formula presented)

Abstract

Neutron scattering results for the tetragonal compound (formula presented) give evidence for two crystal field (CF) excitations at 6.9 and 23.6 meV. The scattering can be fit assuming a set of CF parameters (formula presented) (formula presented) and (formula presented) To compare our results with previous work, we calculate the susceptibility and specific heat for this CF scheme, including a molecular field term (formula presented) to account for the Kondo effect. We also include a calculation based on these CF parameters, which uses the noncrossing approximation to the Anderson model to estimate the effect of Kondo physics on the susceptibility, specific heat, and neutron linewidths. © 2002 The American Physical Society.