Abstract
We present the results of a polarized neutron scattering study of crystal-field (CF) excitations in a $\mathrm{CePtSn}$ single crystal and their interpretation, describing the magnetic properties of the metallic Kondo antiferromagnet $\mathrm{CePtSn}$ in its paramagnetic phase. Using neutron polarization analysis, we demonstrate that all terms of the monoclinic site CF Hamiltonian have to be considered in order to account for all the available experimental data, including susceptibility and high-field magnetization measurements. The CF eigenstates, as probed by inelastic polarized neutron scattering, are not affected by cooperative phenomena neither in the vicinity of the Kondo temperature, ${T}_{\mathrm{K}}$, nor below the N\'eel temperature, ${T}_{\mathrm{N}}$.
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