Abstract
A group of ternary cerium compounds In (T=Ni, Cu, Rh, Pd, Pt, and Au) has been synthesized. As found from single-crystal and powder x-ray-diffraction studies, all these phases crystallize in a primitive tetragonal structure of the type. Magnetic measurements (magnetization, dc and ac susceptibility) have revealed the physical properties of these intermetallics to be mainly governed by the 4f-d hybridization. Depending on the filling of the transition metal d band the ground state in In changes from a nonmagnetic to a well localized magnetic regime. It was proved that In and In are intermediate-valence systems, In is a strongly temperature-dependent paramagnet, whereas In, In, and In order magnetically at low temperatures. Measurements of the electrical resistivity have corroborated the intermediate-valence behavior in In and In. In turn, the resistivity of the remaining ternaries studied was found to be determined by an interplay of Kondo scattering and crystal-field effects. For In which behaves like a spin-fluctuating system due to strong Kondo-type interactions a nonmagnetic heavy-fermion ground state probably occurs. © 1996 The American Physical Society.
- Received 14 February 1996
DOI:https://doi.org/10.1103/PhysRevB.54.9891
©1996 American Physical Society