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We have performed X-ray powder diffraction, magnetization, electricalresistivity, heat capacity and inelastic neutron scattering (INS) toinvestigate the physical properties of the intermetallic series of compoundsCeCuBi$_{2-x}$Sb$_{x}$. These compounds crystallize in a tetragonal structurewith space group $P4/nmm$ and present antiferromagnetic transition temperaturesranging from 3.6 K to 16 K. Remarkably, the magnetization easy axis changesalong the series, which is closely related to the variations of the tetragonalcrystalline electric field (CEF) parameters. This evolution was analyzed usinga mean field model, which included anisotropic nearest-neighbor interactionsand the tetragonal CEF Hamiltonian. The CEF parameters were obtained by fittingthe magnetic susceptibility data with the constraints given by the INSmeasurements. Finally, we discuss how this CEF evolution can affect the Kondophysics and the search for a superconducting state in this family.

Tuning the crystalline electric field and magnetic anisotropy along the CeCuBi$_{2-x}$Sb$_{x}$ series