Abstract
We report a preliminary study of the Pr 3+ ground-state multiplet of Pr 2NiO 4. The crystal field energy levels are determined from neutron scattering and specific heat data, and an analysis is presented in terms of an approximate tetragonal crystal field model. The low-temperature magnetic properties of Pr 3+ are governed by two singlets of Γ 1 and Γ 2 symmetry, respectively, separated in energy by 4.3 meV. No magnetic ordering of the Pr sublattice has been detected.
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